Search for "RE4 PSP Revival Mod" on fan forums. This pack takes the highly compressed ISO and injects PSP boot sounds and memory card icons.
Use software like or CSO compressor typically found in homebrew toolkits. Settings for "highly compressed": download resident evil 4 psp highly compressed
: These are often modified versions of other PSP games (like Syphon Filter or Free Running ) with Resident Evil skins, textures, and UI elements to mimic RE4. Search for "RE4 PSP Revival Mod" on fan forums