Tony Hawk's Underground 2 Remix ISO/CSO Problem?

I have a PSP Go running Pro CFW B6 on 6.39. I soft modded it because THUG2 wasn't on the PSN store. Since I have the UMD version I have legal rights to download an ISO version, so I did. The ISO loads up, but once it gets past the opening movie it crashes and my PSP turns off. All the other ISO games I've tried have worked, but this one hasn't. Is there any type of patch or solution?