well, getting a new video card shouldn't be much of a hassle. it is possible to get a good card for under $100 (US) that will run TSL just fine. check the video card section @ NewEgg (
www.newegg.com), and you should be able to find a good one for under $100 for just about any interface (AGP, PCI, & PCI-E).
as for attempting other routes to make the game run, i'm not aware of any. although the game has limited support for your card, you obviously found out that it doesn't have full support for it.
still, i'll try to help you out a bit w/o making you get a new card. first off, the game is trying to play a movie after you try to go to Telos. so, even if you'll miss a bit of the action, go ahead and disable the movies in the 'Configuration' option whenever the game auto-runs after you put in the CD. if this doesn't fix it, then try to re-install the game (make sure you backup the saves unless you want to redo Peragus again).
if neither of those two suggestions work, then you might want to go ahead and invest in the new video card. that should fix the problem. :)