Crashing Issues

[kingtoid]

Hello,
I have been playing this game as of late and have grown increasingly frustrated by the fact that the game has gotten to a point that it can't get past.
I have the random crashing issues where it crashes every few hours of gameplay, but there is one spot on a mission that the game always, I mean every time, 6 times in a row, crashes. It's when you do the mission where you meet with the two other guys to go crash into the water tower and destroy the "bad guys'" compound. I think that it is called "go meet at the gorge". Any way, after you meet at the truck stop and the cinematic plays, the second it goes back to gameplay, it stops and the whole thing goes back to desktop. Sometimes it has a "Rig'n'Roll has stopped working" dialog box, but it always crashes. You can see the game load, as it fades from black into game play and you can see all the models loaded and the sound works, but as it completes fading back to reality it dies.

Specs:
CPU: Athlon 64 X2 (1.9GHz) tried at this setting and tried with CPU OC'ed to 2.2 GHz. Same error. Problem is not CPU.
RAM: 3Gb DDR2 800
Video Card: 9800GT

Before saying it, the problem is NOT the CPU. I have checked, and also ran the game at 2.4GHz and 2.5GHz and it was no different.

It seems almost like a file is missing or corrupted. Does anybody know what this is or how to fix it?