Open windows event viewer and check Windows Logs > Application. Look for an error for psobb.exe at the time the game crashed, then post the fault module (after the final backslash, which would be psobb.exe usually) and the fault offset.
Alternatively, it's probably a
DEP crash. One quick thing to verify it would be to equip a handgun and shoot it offscreen (to the left or right, or through the camera).[/URL]