If you have downloaded a modded ISO from a site like Ristechy, follow these general steps to get it running:

The last official FIFA Street game released was FIFA Street (2012) , often called FIFA Street 4, but it was only released for PlayStation 3 and Xbox 360 . It was never made for the PSP.

If you still want to search carefully, use (r/PPSSPP, r/Roms) or trusted forums like GBAtemp , but expect no official “FIFA Street 4” for PSP.

Most versions are highly compressed, often around 700MB to 1GB, making them accessible for mobile storage.

Once you are inside the game, here is what specifically makes the "Ristechy Top" version of FIFA Street 4 stand out: