This guide is not meant for installing PPSSPP texture swaps (people commonly reference them as mods), it is meant for installing mods which actually edit the game files so you can use them on your real console or just play them using any emulator.
UMDGen (optional and if you plan to rebuild the iso) Download
You will need to extract your game ISO.
Using built-in Windows 10 functionality
If you use Windows 10, you should be able to open ISO contents by just double clicking at the .ISO file.
Select both items and drag them over to a folder (create new or existing one).
Download and extract UMDGen.
Run the program, open your game ISO and extract contents to a folder.
Preparing game data
Open PSP_GAME folder, go to SYSDIR directory and delete/rename EBOOT.BIN.
Copy BOOT.BIN from the same directory, rename it as EBOOT.BIN.
This step replaces encrypted PSP executable with a clean one.
Download any mod, extract archive contents to PSP_GAME directory.
Your game folder should look like this:
Execute Install-GAMEREGION.bat to install the mod.
If you don’t know what ULES and ULUS mean:
ULES - European Release
ULUS - United States Release
NOTE: Selecting wrong installer might break your game and you will need to start over, please be careful!
All done, now you can navigate to your modded folder in PPSSPP to play the game without the need of an ISO.
Feel free to remove mod files after installing one.
If you want to run mods on real hardware (or don’t want to play the game from a folder) , you will need to rebuild/edit the ISO.
Launch UMDGen again, open your ISO and do the following:
- Drag EBOOT.BIN from your modded copy folder to PSP_GAME\SYSDIR folder in UMDGen, confirm overwrite
- Drag ARCHIVE.BIN/ARCHIVE.IMP from your modded copy folder to PSP_GAME\USRDIR in UMDGen, confirm overwrite
Once this is done, select File->Save As and save your new ISO somewhere.
NOTE: Please use Save As option whenever you are doing ISO changes, Save option might sometimes break the file