Midnight Club 3: Dub Edition is a racing game developed by Angel Studios and published by Rockstar Games. It was released in 2005 for the PlayStation 2, Xbox, and PSP. The game features high-speed racing, open-world exploration, and a soundtrack with dub music.
You're looking for information on Midnight Club 3: Dub Edition for the PSP, specifically a highly compressed and patched ISO file. Here's what I found: