If it's the sound...then type dxdiag, and turn down the Direct Sound Acceleration...put it to basic or standard. This fixes a lot fo sound related problems with older games. One crash I know it fixes for me is the Dolphin jump part. My PC would crash when the sound of the splash played.
The game that I've notice befitting most from this is Morrowind.....but that may be because I'm using a SB-live with non-updated Sound drivers....thanx to my Win98 system and Creatives' lazy programmers, of not updating that Win98 driver. Same may hold true for the Dolphin jump crash on my machine. Which basicly, means.......it may not work for you. It may be Win98, Sb-live exclusive..