Every PSP game has a unique ID. For the fan-converted Storm 3 , the ID varies depending on who built the ISO, but it is commonly:
offer dedicated texture files for the USA version (ULUS10518) of Ultimate Ninja Heroes 3 How to Install Textures on PPSSPP Extract the Files: Every PSP game has a unique ID
Extract your downloaded textures directly into that ID folder. load the Storm 3 game
Open PPSSPP, load the Storm 3 game, then go to Settings -> Tools -> Developer Tools -> Dump Next Frame . After dumping, go to Textures.ini file – the folder name created is your Game ID. then go to Settings ->