diff --git a/build/gcdfirm/sdmc-launcher/ARM7/main.c b/build/gcdfirm/sdmc-launcher/ARM7/main.c
index 791b1329..115c968a 100644
--- a/build/gcdfirm/sdmc-launcher/ARM7/main.c
+++ b/build/gcdfirm/sdmc-launcher/ARM7/main.c
@@ -83,6 +83,7 @@ static void PreInit(void)
 ***************************************************************/
 static void EraseAll(void)
 {
+    MI_CpuClearFast( OSi_GetFromFirmAddr(), sizeof(OSFromFirmBuf) );
 #ifdef SDK_FINALROM
     MI_CpuClearFast( (void*)HW_TWL_ROM_HEADER_BUF, HW_TWL_ROM_HEADER_BUF_SIZE );
     OS_BootFromFIRM();
diff --git a/build/gcdfirm/sdmc-launcher/ARM9/main.c b/build/gcdfirm/sdmc-launcher/ARM9/main.c
index b64d5c3a..f3c128b9 100644
--- a/build/gcdfirm/sdmc-launcher/ARM9/main.c
+++ b/build/gcdfirm/sdmc-launcher/ARM9/main.c
@@ -109,14 +109,21 @@ static void PostInit(void)
 /***************************************************************
     CheckHeader
 
-    ヘッダの内容がTWLアプリとして問題ないかチェック
+    ヘッダがシステムメニューとして問題ないかチェック
 ***************************************************************/
 static BOOL CheckHeader(void)
 {
     static ROM_Header_Short* const rhs = (ROM_Header_Short*)HW_TWL_ROM_HEADER_BUF;
-    // TODO
-    // イニシャルコード
+    // イニシャルコードなど
     OS_TPrintf("Initial Code        : %08X\n", *(u32*)rhs->game_code);
+    OS_TPrintf("Platform Code       : %02X\n", rhs->platform_code);
+    OS_TPrintf("Codec Mode          : %s\n", rhs->codec_mode ? "TWL" : "NITRO");
+    OS_TPrintf("Sigunature          : %s\n", rhs->enable_signature ? "AVAILABLE" : "NOT AVAILABLE");
+    OS_TPrintf("AES Encryption      : %s\n", rhs->enable_aes ? "AVAILABLE" : "NOT AVAILABLE");
+    if ( rhs->enable_aes )
+    {
+        OS_TPrintf("AES Key Type        : %s\n", rhs->developer_encrypt ? "FOR DEVELOPMENT" : "FOR PRODUCT");
+    }
     // エントリポイント
     OS_TPrintf("ARM9 Entry point    : %08X\n", rhs->main_entry_address);
     OS_TPrintf("ARM7 Entry point    : %08X\n", rhs->sub_entry_address);
@@ -133,6 +140,35 @@ static BOOL CheckHeader(void)
     OS_TPrintf("ARM7 LTD ROM address: %08X\n", rhs->sub_ltd_rom_offset);
     OS_TPrintf("ARM7 LTD RAM address: %08X\n", rhs->sub_ltd_ram_address);
     OS_TPrintf("ARM7 LTD size       : %08X\n", rhs->sub_ltd_size);
+    // 順序ほぼ最適化済み
+#ifndef FIRM_USE_TWLSDK_KEYS
+    if ( rhs->platform_code != PLATFORM_CODE_TWL_LIMITED ||     // TWL Limited only
+         !rhs->codec_mode ||                                    // TWL mode only
+         !rhs->enable_signature ||                              // Should be use ROM header signature
+#else
+    if (    // no check
+#endif
+        // should be in main memory
+         HW_TWL_MAIN_MEM > (u32)rhs->main_ram_address ||
+         HW_TWL_MAIN_MEM > (u32)rhs->sub_ram_address ||
+         HW_TWL_MAIN_MEM > (u32)rhs->main_ltd_ram_address ||
+         HW_TWL_MAIN_MEM > (u32)rhs->sub_ltd_ram_address ||
+        // should be in static area without Limited region
+         (u32)rhs->main_ram_address > (u32)rhs->main_entry_address ||
+         (u32)rhs->sub_ram_address > (u32)rhs->sub_entry_address ||
+        // should be in main memory (end address)
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->main_ram_address + rhs->main_size ||
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->sub_ram_address + rhs->sub_size ||
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->main_ltd_ram_address + rhs->main_ltd_size ||
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->sub_ltd_ram_address + rhs->sub_ltd_size ||
+        // should be in static area without Limited region (end address)
+         (u32)rhs->main_ram_address + rhs->main_size <= (u32)rhs->main_entry_address ||
+         (u32)rhs->sub_ram_address + rhs->sub_size <= (u32)rhs->sub_entry_address ||
+         0 )
+    {
+        OS_TPrintf("Invalid ROM header for MENU Launcher!\n");
+        return FALSE;
+    }
     return TRUE;
 }
 
@@ -145,8 +181,10 @@ static BOOL CheckHeader(void)
 ***************************************************************/
 static void EraseAll(void)
 {
+    MI_CpuClearFast( OSi_GetFromFirmAddr(), sizeof(OSFromFirmBuf) );
 #ifdef SDK_FINALROM
     MI_CpuClearFast( (void*)HW_TWL_ROM_HEADER_BUF, HW_TWL_ROM_HEADER_BUF_SIZE );
+    MI_CpuClearFast( (void*)HW_ROM_HEADER_BUF, HW_ROM_HEADER_BUF_END-HW_ROM_HEADER_BUF );
     OS_BootFromFIRM();
 #endif
 }
@@ -202,9 +240,10 @@ void TwlMain( void )
     EraseAll();
 
     // failed
-    while (1)
-    {
-        PXI_NotifyID( FIRM_PXI_ID_NULL );
-    }
+    PXI_NotifyID( FIRM_PXI_ID_ERR );
+    PXI_NotifyID( FIRM_PXI_ID_ERR );
+    PXI_NotifyID( FIRM_PXI_ID_ERR );
+    PXI_NotifyID( FIRM_PXI_ID_ERR );
+    OS_Terminate();
 }
 
diff --git a/build/nandfirm/menu-launcher/ARM7/main.c b/build/nandfirm/menu-launcher/ARM7/main.c
index 5fe49242..32e25a8e 100644
--- a/build/nandfirm/menu-launcher/ARM7/main.c
+++ b/build/nandfirm/menu-launcher/ARM7/main.c
@@ -111,6 +111,7 @@ static void PreInit(void)
 ***************************************************************/
 static void EraseAll(void)
 {
+    MI_CpuClearFast( OSi_GetFromFirmAddr(), sizeof(OSFromFirmBuf) );
 #ifdef SDK_FINALROM
     MI_CpuClearFast( (void*)HW_TWL_ROM_HEADER_BUF, HW_TWL_ROM_HEADER_BUF_SIZE );
     OS_BootFromFIRM();
diff --git a/build/nandfirm/menu-launcher/ARM9/main.c b/build/nandfirm/menu-launcher/ARM9/main.c
index bd2faf25..6338a093 100644
--- a/build/nandfirm/menu-launcher/ARM9/main.c
+++ b/build/nandfirm/menu-launcher/ARM9/main.c
@@ -126,14 +126,20 @@ static void PostInit(void)
     CheckHeader
 
     ヘッダがシステムメニューとして問題ないかチェック
-    先頭32Bは固定値と思われ (リマスターバージョンは違うかな)
 ***************************************************************/
 static BOOL CheckHeader(void)
 {
     static ROM_Header_Short* const rhs = (ROM_Header_Short*)HW_TWL_ROM_HEADER_BUF;
-    // TODO
-    // イニシャルコード
+    // イニシャルコードなど
     OS_TPrintf("Initial Code        : %08X\n", *(u32*)rhs->game_code);
+    OS_TPrintf("Platform Code       : %02X\n", rhs->platform_code);
+    OS_TPrintf("Codec Mode          : %s\n", rhs->codec_mode ? "TWL" : "NITRO");
+    OS_TPrintf("Sigunature          : %s\n", rhs->enable_signature ? "AVAILABLE" : "NOT AVAILABLE");
+    OS_TPrintf("AES Encryption      : %s\n", rhs->enable_aes ? "AVAILABLE" : "NOT AVAILABLE");
+    if ( rhs->enable_aes )
+    {
+        OS_TPrintf("AES Key Type        : %s\n", rhs->developer_encrypt ? "FOR DEVELOPMENT" : "FOR PRODUCT");
+    }
     // エントリポイント
     OS_TPrintf("ARM9 Entry point    : %08X\n", rhs->main_entry_address);
     OS_TPrintf("ARM7 Entry point    : %08X\n", rhs->sub_entry_address);
@@ -150,6 +156,32 @@ static BOOL CheckHeader(void)
     OS_TPrintf("ARM7 LTD ROM address: %08X\n", rhs->sub_ltd_rom_offset);
     OS_TPrintf("ARM7 LTD RAM address: %08X\n", rhs->sub_ltd_ram_address);
     OS_TPrintf("ARM7 LTD size       : %08X\n", rhs->sub_ltd_size);
+    // 順序ほぼ最適化済み
+    if ( rhs->platform_code != PLATFORM_CODE_TWL_LIMITED ||     // TWL Limited only
+         !rhs->codec_mode ||                                    // TWL mode only
+         !rhs->enable_signature ||                              // Should be use ROM header signature
+         (rhs->titleID_Hi & 0x0005) != 0x0005 ||                // check only NAND/SYSTEM bits (need?)
+        // should be in main memory
+         HW_TWL_MAIN_MEM > (u32)rhs->main_ram_address ||
+         HW_TWL_MAIN_MEM > (u32)rhs->sub_ram_address ||
+         HW_TWL_MAIN_MEM > (u32)rhs->main_ltd_ram_address ||
+         HW_TWL_MAIN_MEM > (u32)rhs->sub_ltd_ram_address ||
+        // should be in static area without Limited region
+         (u32)rhs->main_ram_address > (u32)rhs->main_entry_address ||
+         (u32)rhs->sub_ram_address > (u32)rhs->sub_entry_address ||
+        // should be in main memory (end address)
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->main_ram_address + rhs->main_size ||
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->sub_ram_address + rhs->sub_size ||
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->main_ltd_ram_address + rhs->main_ltd_size ||
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->sub_ltd_ram_address + rhs->sub_ltd_size ||
+        // should be in static area without Limited region (end address)
+         (u32)rhs->main_ram_address + rhs->main_size <= (u32)rhs->main_entry_address ||
+         (u32)rhs->sub_ram_address + rhs->sub_size <= (u32)rhs->sub_entry_address ||
+         0 )
+    {
+        OS_TPrintf("Invalid ROM header for MENU Launcher!\n");
+        return FALSE;
+    }
     return TRUE;
 }
 
@@ -162,8 +194,10 @@ static BOOL CheckHeader(void)
 ***************************************************************/
 static void EraseAll(void)
 {
+    MI_CpuClearFast( OSi_GetFromFirmAddr(), sizeof(OSFromFirmBuf) );
 #ifdef SDK_FINALROM
     MI_CpuClearFast( (void*)HW_TWL_ROM_HEADER_BUF, HW_TWL_ROM_HEADER_BUF_SIZE );
+    MI_CpuClearFast( (void*)HW_ROM_HEADER_BUF, HW_ROM_HEADER_BUF_END-HW_ROM_HEADER_BUF );
     OS_BootFromFIRM();
 #endif
 }
diff --git a/build/nandfirm/menu-launcher2/ARM7/main.c b/build/nandfirm/menu-launcher2/ARM7/main.c
index 68bb853e..89694e70 100644
--- a/build/nandfirm/menu-launcher2/ARM7/main.c
+++ b/build/nandfirm/menu-launcher2/ARM7/main.c
@@ -111,6 +111,7 @@ static void PreInit(void)
 ***************************************************************/
 static void EraseAll(void)
 {
+    MI_CpuClearFast( OSi_GetFromFirmAddr(), sizeof(OSFromFirmBuf) );
 #ifdef SDK_FINALROM
     MI_CpuClearFast( (void*)HW_TWL_ROM_HEADER_BUF, HW_TWL_ROM_HEADER_BUF_SIZE );
     OS_BootFromFIRM();
diff --git a/build/nandfirm/menu-launcher2/ARM9/main.c b/build/nandfirm/menu-launcher2/ARM9/main.c
index 5f838097..8837ee2f 100644
--- a/build/nandfirm/menu-launcher2/ARM9/main.c
+++ b/build/nandfirm/menu-launcher2/ARM9/main.c
@@ -127,14 +127,20 @@ static void PostInit(void)
     CheckHeader
 
     ヘッダがシステムメニューとして問題ないかチェック
-    先頭32Bは固定値と思われ (リマスターバージョンは違うかな)
 ***************************************************************/
 static BOOL CheckHeader(void)
 {
     static ROM_Header_Short* const rhs = (ROM_Header_Short*)HW_TWL_ROM_HEADER_BUF;
-    // TODO
-    // イニシャルコード
+    // イニシャルコードなど
     OS_TPrintf("Initial Code        : %08X\n", *(u32*)rhs->game_code);
+    OS_TPrintf("Platform Code       : %02X\n", rhs->platform_code);
+    OS_TPrintf("Codec Mode          : %s\n", rhs->codec_mode ? "TWL" : "NITRO");
+    OS_TPrintf("Sigunature          : %s\n", rhs->enable_signature ? "AVAILABLE" : "NOT AVAILABLE");
+    OS_TPrintf("AES Encryption      : %s\n", rhs->enable_aes ? "AVAILABLE" : "NOT AVAILABLE");
+    if ( rhs->enable_aes )
+    {
+        OS_TPrintf("AES Key Type        : %s\n", rhs->developer_encrypt ? "FOR DEVELOPMENT" : "FOR PRODUCT");
+    }
     // エントリポイント
     OS_TPrintf("ARM9 Entry point    : %08X\n", rhs->main_entry_address);
     OS_TPrintf("ARM7 Entry point    : %08X\n", rhs->sub_entry_address);
@@ -151,6 +157,32 @@ static BOOL CheckHeader(void)
     OS_TPrintf("ARM7 LTD ROM address: %08X\n", rhs->sub_ltd_rom_offset);
     OS_TPrintf("ARM7 LTD RAM address: %08X\n", rhs->sub_ltd_ram_address);
     OS_TPrintf("ARM7 LTD size       : %08X\n", rhs->sub_ltd_size);
+    // 順序ほぼ最適化済み
+    if ( rhs->platform_code != PLATFORM_CODE_TWL_LIMITED ||     // TWL Limited only
+         !rhs->codec_mode ||                                    // TWL mode only
+         !rhs->enable_signature ||                              // Should be use ROM header signature
+         (rhs->titleID_Hi & 0x0005) != 0x0005 ||                // check only NAND/SYSTEM bits (need?)
+        // should be in main memory
+         HW_TWL_MAIN_MEM > (u32)rhs->main_ram_address ||
+         HW_TWL_MAIN_MEM > (u32)rhs->sub_ram_address ||
+         HW_TWL_MAIN_MEM > (u32)rhs->main_ltd_ram_address ||
+         HW_TWL_MAIN_MEM > (u32)rhs->sub_ltd_ram_address ||
+        // should be in static area without Limited region
+         (u32)rhs->main_ram_address > (u32)rhs->main_entry_address ||
+         (u32)rhs->sub_ram_address > (u32)rhs->sub_entry_address ||
+        // should be in main memory (end address)
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->main_ram_address + rhs->main_size ||
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->sub_ram_address + rhs->sub_size ||
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->main_ltd_ram_address + rhs->main_ltd_size ||
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->sub_ltd_ram_address + rhs->sub_ltd_size ||
+        // should be in static area without Limited region (end address)
+         (u32)rhs->main_ram_address + rhs->main_size <= (u32)rhs->main_entry_address ||
+         (u32)rhs->sub_ram_address + rhs->sub_size <= (u32)rhs->sub_entry_address ||
+         0 )
+    {
+        OS_TPrintf("Invalid ROM header for MENU Launcher!\n");
+        return FALSE;
+    }
     return TRUE;
 }
 
@@ -163,8 +195,10 @@ static BOOL CheckHeader(void)
 ***************************************************************/
 static void EraseAll(void)
 {
+    MI_CpuClearFast( OSi_GetFromFirmAddr(), sizeof(OSFromFirmBuf) );
 #ifdef SDK_FINALROM
     MI_CpuClearFast( (void*)HW_TWL_ROM_HEADER_BUF, HW_TWL_ROM_HEADER_BUF_SIZE );
+    MI_CpuClearFast( (void*)HW_ROM_HEADER_BUF, HW_ROM_HEADER_BUF_END-HW_ROM_HEADER_BUF );
     OS_BootFromFIRM();
 #endif
 }
diff --git a/build/nandfirm/sdmc-launcher/ARM7/main.c b/build/nandfirm/sdmc-launcher/ARM7/main.c
index 682e57da..5acb062d 100644
--- a/build/nandfirm/sdmc-launcher/ARM7/main.c
+++ b/build/nandfirm/sdmc-launcher/ARM7/main.c
@@ -83,6 +83,7 @@ static void PreInit(void)
 ***************************************************************/
 static void EraseAll(void)
 {
+    MI_CpuClearFast( OSi_GetFromFirmAddr(), sizeof(OSFromFirmBuf) );
 #ifdef SDK_FINALROM
     MI_CpuClearFast( (void*)HW_TWL_ROM_HEADER_BUF, HW_TWL_ROM_HEADER_BUF_SIZE );
     OS_BootFromFIRM();
diff --git a/build/nandfirm/sdmc-launcher/ARM9/main.c b/build/nandfirm/sdmc-launcher/ARM9/main.c
index b64d5c3a..f3c128b9 100644
--- a/build/nandfirm/sdmc-launcher/ARM9/main.c
+++ b/build/nandfirm/sdmc-launcher/ARM9/main.c
@@ -109,14 +109,21 @@ static void PostInit(void)
 /***************************************************************
     CheckHeader
 
-    ヘッダの内容がTWLアプリとして問題ないかチェック
+    ヘッダがシステムメニューとして問題ないかチェック
 ***************************************************************/
 static BOOL CheckHeader(void)
 {
     static ROM_Header_Short* const rhs = (ROM_Header_Short*)HW_TWL_ROM_HEADER_BUF;
-    // TODO
-    // イニシャルコード
+    // イニシャルコードなど
     OS_TPrintf("Initial Code        : %08X\n", *(u32*)rhs->game_code);
+    OS_TPrintf("Platform Code       : %02X\n", rhs->platform_code);
+    OS_TPrintf("Codec Mode          : %s\n", rhs->codec_mode ? "TWL" : "NITRO");
+    OS_TPrintf("Sigunature          : %s\n", rhs->enable_signature ? "AVAILABLE" : "NOT AVAILABLE");
+    OS_TPrintf("AES Encryption      : %s\n", rhs->enable_aes ? "AVAILABLE" : "NOT AVAILABLE");
+    if ( rhs->enable_aes )
+    {
+        OS_TPrintf("AES Key Type        : %s\n", rhs->developer_encrypt ? "FOR DEVELOPMENT" : "FOR PRODUCT");
+    }
     // エントリポイント
     OS_TPrintf("ARM9 Entry point    : %08X\n", rhs->main_entry_address);
     OS_TPrintf("ARM7 Entry point    : %08X\n", rhs->sub_entry_address);
@@ -133,6 +140,35 @@ static BOOL CheckHeader(void)
     OS_TPrintf("ARM7 LTD ROM address: %08X\n", rhs->sub_ltd_rom_offset);
     OS_TPrintf("ARM7 LTD RAM address: %08X\n", rhs->sub_ltd_ram_address);
     OS_TPrintf("ARM7 LTD size       : %08X\n", rhs->sub_ltd_size);
+    // 順序ほぼ最適化済み
+#ifndef FIRM_USE_TWLSDK_KEYS
+    if ( rhs->platform_code != PLATFORM_CODE_TWL_LIMITED ||     // TWL Limited only
+         !rhs->codec_mode ||                                    // TWL mode only
+         !rhs->enable_signature ||                              // Should be use ROM header signature
+#else
+    if (    // no check
+#endif
+        // should be in main memory
+         HW_TWL_MAIN_MEM > (u32)rhs->main_ram_address ||
+         HW_TWL_MAIN_MEM > (u32)rhs->sub_ram_address ||
+         HW_TWL_MAIN_MEM > (u32)rhs->main_ltd_ram_address ||
+         HW_TWL_MAIN_MEM > (u32)rhs->sub_ltd_ram_address ||
+        // should be in static area without Limited region
+         (u32)rhs->main_ram_address > (u32)rhs->main_entry_address ||
+         (u32)rhs->sub_ram_address > (u32)rhs->sub_entry_address ||
+        // should be in main memory (end address)
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->main_ram_address + rhs->main_size ||
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->sub_ram_address + rhs->sub_size ||
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->main_ltd_ram_address + rhs->main_ltd_size ||
+         HW_TWL_MAIN_MEM_END <= (u32)rhs->sub_ltd_ram_address + rhs->sub_ltd_size ||
+        // should be in static area without Limited region (end address)
+         (u32)rhs->main_ram_address + rhs->main_size <= (u32)rhs->main_entry_address ||
+         (u32)rhs->sub_ram_address + rhs->sub_size <= (u32)rhs->sub_entry_address ||
+         0 )
+    {
+        OS_TPrintf("Invalid ROM header for MENU Launcher!\n");
+        return FALSE;
+    }
     return TRUE;
 }
 
@@ -145,8 +181,10 @@ static BOOL CheckHeader(void)
 ***************************************************************/
 static void EraseAll(void)
 {
+    MI_CpuClearFast( OSi_GetFromFirmAddr(), sizeof(OSFromFirmBuf) );
 #ifdef SDK_FINALROM
     MI_CpuClearFast( (void*)HW_TWL_ROM_HEADER_BUF, HW_TWL_ROM_HEADER_BUF_SIZE );
+    MI_CpuClearFast( (void*)HW_ROM_HEADER_BUF, HW_ROM_HEADER_BUF_END-HW_ROM_HEADER_BUF );
     OS_BootFromFIRM();
 #endif
 }
@@ -202,9 +240,10 @@ void TwlMain( void )
     EraseAll();
 
     // failed
-    while (1)
-    {
-        PXI_NotifyID( FIRM_PXI_ID_NULL );
-    }
+    PXI_NotifyID( FIRM_PXI_ID_ERR );
+    PXI_NotifyID( FIRM_PXI_ID_ERR );
+    PXI_NotifyID( FIRM_PXI_ID_ERR );
+    PXI_NotifyID( FIRM_PXI_ID_ERR );
+    OS_Terminate();
 }