Oh yeah can def be done I don't have any experience with ATi cards + XP but the majority of my mining is on XP (old school!) with an nvidia card using GUIMiner

4 numbers skipped in img above ^^

Ah bummer the CUDA miner only goes at about 1/7th the speed of the default miner =/ I guess b/c I don't have a cuda core. Haha would love to get a new AMD/ATi card sometime soon not an nvidia fanboy just got the 8800 GT since it was such a good deal back in the day (5+ years ago?) getting around 28 MHash/s is all

Wondering if anyone knows of any better miner than GUIMiner default (tried all other miners that come on GUIMiner) for the 8800GT? Pretty old card guessing there isn't a miner optimized for it?