Cars+2+psp+save+data+[hot] Free -
: Move the downloaded folder into the SAVEDATA directory. If a folder already exists with that name, you may want to back it up first, as this will overwrite your current progress.
When you download a archive from a reputable source, you typically get the following: cars+2+psp+save+data+free
If you are looking for "free" save data that has everything already unlocked (all cars, tracks, and missions), community sites like GameFAQs host user-uploaded save files for various platforms, including PSP and PC. Unlocking Content with Cheat Codes : Move the downloaded folder into the SAVEDATA directory