No, SreeDee is slow, slow, slow, not an option for general working, unless you want everything as a flat shaded bounding box.

I'm not sure it's entirely Poser, and I'm not sure you can completely blame it on the drivers. I have an XP Pro x64 boot too, and with the same driver version and the same GPU, I don't have any crashes in XP. But that's just circumstantial evidence and speculation to go there. However, for OGL  apps, the graphics response is noticeably quicker in Vista than in XP, while games show no difference that I've noticed.

Who knows. Just one of those things we have to live with, I guess. AT least I can get Poser to work, and if it doesn't crash instantly, it stays stable for hours. Only some scenes crash, though, and even rebuilding them identically doesn't cause it.

Like I said though... who knows...