If you extracted the game to a folder (like PSP_GAME ), you must rebuild it into a single ISO file for it to be recognized by emulators like PPSSPP . Open UMDGen and drag your PSP_GAME folder into the window.
This is the critical step for keeping your patches intact. convert pbp to iso patched
Use UMDGen to open the patched ISO. This allows you to verify the file structure or compress it into a .cso to save space. If you extracted the game to a folder