Hi,
I do not have as much experience as Alan running Toxik on bootcamp but I have done it using Windows XP. I have not tried it using Vista yet.
As far as graphic cards I recommend NVIDIA Quadro cards because I have had great experiences with them and before Toxik 2009 you had to have a Quadro card to run Toxik. 2009 now is supported on other cards than just the Quadro cards.
Just one more note and this is related to running Toxik on Vista or XP but not using bootcamp I have Toxik running on my laptop with Vista and it runs great no problems at all.
Ken LaRue
Autodesk Application Engineer
Toxik / Combustion
Training DVDs
http://www.thestreetproductions.com