SH3 and Vista 64 (yeah I know)

[mattchip]

I know this has been beaten to death, but of all the posts regarding it, I can't find this one addressed. My system recently died (a bricked Seagate HD). Turns out my backup was corrupt also, thanks Norton. I'm reinstalling everything. It's an HP with an AMD quad 2200 and an EVGA gt240 gpu. I have the SH3 dvd without the Starforce protection. If I try to run SH3, with or without the patch, I get the error message about not having the right OS. It doesn't even get as far as asking me for my key code. I tried it with the NoCD patch and it starts, but crashes to desktop as soon as the loading screen completes. I'm running it in Win XP compatability mode with the UAC off. Ubisoft, of course, just says, "If it doesn't say Vista on the box, it may not work" I had it working before, I just don't remember how.

If anyone has an idea what I may have missed, let me know. Or if you know of a previously published question, that would be good too. I've read about 30 of them, and haven't found one yet, getting cross-eyed. I'm this close to throwing the whole computer out the window. This has been a miserable 3 weeks.

Thanks in advance,
Matt