Best oxymoron ever. *shot*
But seriously - since the DeltaChrome series seems to have gone down like a lead balloon (I've never seen one at a computer fair, let alone in a retail store - hell, I've seen more Plextor DVD writer drives at computer fairs than I have DeltaChrome cards!) it's hard to imagine anyone putting in decent support for it in their applications. There hasn't ever been much support for their cards - as a former owner of an S3 Savage4 (8 MB, AGP) I can testify to this; about the only game it can run at full speed (just) is Motocross Madness, which has about as much graphic detail as a blank sheet of paper.
Part of the reason for lack of support is down to the fact that S3 never been very popular - their last attempt to impact on the GFX card market was the S3 Savage 2000, which looked great on paper (PC Zone though so anyway) but when it was released (later than planned) it couldn't touch any offering from NVIDIA, or anyone else, for that matter. And it wasn't reasonably cheap either, hence I stuck with my Savage4 until late 2000 when I shifted up to a GeForce 2 MX 64 MB AGP for £100.
Even the Matrox MGA-G200 8 MB onboard GFX (not exactly renowned as being a top gaming card) in my HP Vectra VL could outperform my old Savage4 easily. Granted the Matrox is a bit newer than the Savage4 was, but not that much newer, and Matrox are more renowed for their professional video capture & 3D rendering hardware than for consumer graphics hardware. Whereas S3 don't seem to make anything other than... erm.... consumer graphics hardware. And yet they're not very good at making it (only time it's any good, technically, is when it's very cheap =P).
Nice to see I'm staying on topic here. Anyway, there might be one way of fixing your problem, so try this. Open up Display Properties, go to the Settings tab, and check that the colour level. Try changing it around (in WinXP only 16 and 32-bit are usually available, unless you're in Safe Mode). If that doesn't sort it, click on the "Advanced" button and in the next window, and click on the "Troubleshoot" tab. Try each of the other settings on the slider and see if that solves the problem. If none of those work any better, set it back to "Full" so you don't get problems with other programs / games.