Inside the SAVEDATA folder, each game has its own unique folder ID. For Iron Man 2 , the IDs vary by region:
Ensure the save file region matches your game (e.g., a North American save won't work with a European game disc/ISO). Instructables How to Install Save Data iron man 2 psp save data
If you try to load the save and the game says this usually happens for two reasons: Inside the SAVEDATA folder, each game has its
Copy the folder to \Documents\PPSSPP\PSP\SAVEDATA\ . Inside the SAVEDATA folder