Sounds like a disk problem, to me. If there's a scratch *just right* on the cd, usually over an FMV, especially if that movie also includes sprite movements as well, then that scene will tend to crash the game. Your best bet would be to find a replacement for the disk. Since you actually own a hard copy of the software, it's perfectly legal for you to duplicate a friend's, or use a file sharing program.

But, a new copy of the disk is your best bet. Also, I think there are some hacks that allow the game play without the disk in the computer, but I won't recommend those, that could be dangerous. Spyware/virii/etc aren't cool.