It worked great for me as well, yboi - at first. It *will* BSOD your machine if you leave it on long enough. The program has a memory leak, and when it hits the maximum amount Windows can give it, and tries to get more, you'll get a BSOD.
Considering Vista is about 4x more memory hungry than XP, it makes sense the problem manifested itself more quickly on Vista.
I have a stupid questioon if anyone can answer. I have a M170 Dell w/ Nvidia card, but the NHC seems to only talk about the ATI card. Should I download this even though it does not seem to support Nvidia?