i currently have PSP with custom firmware 3.03 oe-c and so far i uploaded 2 cso files and 1 iso file into my memory stick. fifa 2007 (cso) and burnout (iso) worked fine but smash court tennis 3 (cso) didn't. it didnt even appear in my psp screen as a .cso file but when i decompressed it to .iso form, it appeared. however, even then i could not start the game (error 80020148)..does anyone know what's wrong? help is much appreciated, thanks.