Launch the game. If using a PSP, check the Save Data Utility on the home screen to ensure the file isn't marked as "corrupted". Option 2: Using Cheat Codes (No Download Required)
To get a "free" completed save file, you typically need to look at community-driven gaming sites: cars+2+psp+save+data+free
Using someone else's save data can sometimes disable the ability to earn in-game trophies or specific internal milestones if the game detects a different "User ID." However, for a game like Cars 2 on the PSP, this is rarely an issue for general gameplay and exploration. Launch the game