1. Copy EDecrypt folder to ms0:/PSP/GAME
2. With UMDGen open the game you want to decrypt and take file EBOOT.BIN from PSP_GAME/SYSDIR

3. Copy encrypted file(s) to ms0:/enc/ (EBOOT.BIN)

4. Execute EDecrypt v1.3 on PSP
5. Press X to decrypt file(s) or [] to decrypt and patch file(s) for m33

EDecrypt 1.3 for PSP has been release to the Homebrew Community . EDecrypt 1.3 is a pretty simple PSP homebrew that has been updated and release by psp homebrew developer mc707 . EDecrypt 1.3 is available for download below. Remember that you need a psp custom firmware or homebrew enable psp in order to run EDecrypt 1.3 on your PSP .