AAugh!! dang me...
Ok, so then I must recommend a Radeon 9100 PCI, which is in pretty much all situations, teh fastest PCI graphics card available... some can be had for fairly low prices (I think around $55-65), and if you get the 128 bit memory bus verison, you're getting you're money's worth... If you get the 64 bit model, you're basically paying the same price but getting only 2/3 the performance... Mind you, you gotta scatch bte kick and claw for every frame with a PCI card, so it's good in this situation to get the "best of" when looking for one...
And have you given thought to upgrading to Windows XP? Now (or soon, or something?

) would be a good time...
