Believe it or not some of the crashes are caused by sound and not video. I'm assuming you're running the game at the same rez as your desktop. That is the first thing all recommend and seems to help. I did have a problem for a while and I found disabling hardware sound and turning the master volume slider down a bit helped a lot. For some reason the problem seemed to go away in time. I can tell you it isn't the video card itself because I orginally had a ti4600 video card. I did have to wrestle with crashes for a while but seemed to finally iron it out with running the rez same as desktop. Later on I got a 9800 pro video card and no problems with it.
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