[GUIDE] How to patch the 5.55/6.00 games to work with all firmwares

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Tools that you will need:

• Any umd dumper
• UMDGen 4.00
• Game Decrypter by Yoshihiro v4 (100% 5.00/5.03 Compatibility)
  

What PSP can benefit?

• The PSP 1000 and PSP 2000 (until motherboard TA-088v2) using Custom Firmwares.
• The PSP 2000-TA-088v3 and 3000 using the 5.03GEN/Custom Firmware Enabler (use mode driver in the M33 vsh menu)
• All games will work with 5.00M33,5.02 GEN,5.03 GEN,Custom Firmware Enabler v3.60,5.50 GEN,5.50 MHU and it seems to be working with 5.50 U3R too.

Installation:

• Download Game Decrypter by Yoshihiro
• Connect your PSP at your PC via USB
• Enter USB Connection
• Extract files and put at your MS root (or the folder GameZDecryptZ direct to \PSP\GAME

Using the Tool:

• Dump your UMD in the memory stick.
• Install UMDGen 4.00 at your PC
• Open your UNTOUCHED (an already decrypted one will work fine too in Game Decrypter v3+) ISO with UMDGen 4.00 and go to File -> File List -> Export... and save it as a .txt file (thisgame.txt for example)
• Close UMDGen
• Reopen UMDGen and reaccess the ISO File
• Retrieve the file EBOOT.BIN located in the folder PSP_GAME / SYSDIR of your ISO (clicking with right mouse button at it and choosing Extract Selected).
• Place this file in the root of your Memory Stick.
• Going into the game menu on your PSP and launch GAME DECRYPT YOSHIHIRO.
• Press O to patch and decrypt your file (wait few seconds, then returns to XMB homebrew).
• Connect your PSP to your PC using your USB cable.
• At the root of your Memory Stick is a new folder "decryptor". Inside the file is located EBOOT.BIN patched.
• With UMDGen, replace the original file EBOOT.BIN the new resulting file.
• Go to File -> File List -> Import... and import your previous .txt saved list (thisgame.txt for example), the program will warn you about force positions, but accept anyway
• Rebuild your ISO clicking at Save button and upload it to the folder ms0: / ISO of your Memory Stick.
• Your ISO is now working on your custom firmware M33,GEN,MHU,U3R and CFWE.

Important: Check Recovery Menu (Holding R when PSP is booting) @ Advanced -> Advanced Configuration if Execute BOOT.BIN in UMD/ISO is DISABLED otherwise no decrypted game will run.
Use UMD ISO MODE = M33 Driver (except for Persona, which needs Sony NP9660) to ensure better compatibility.