Hi Hajo -
Drivers for the chipset and onboard devices come with the mobo CD. Better still goto mobo website and get the latest 64 bit drivers. VIA has 64 dirvers available also at
http://www.viaarena.comVid card - nVidia available from their website.
-ATI as above but still beta.
Various 64 bit drivers are available from various sites eg
http://www.planetamd64.comTried AH2 with XP64, seems smoother but took a very slight framerate hit. But that was using an ATI card, haven't tried it since getting my 6800GT.
Used a seperate partition and dual booted.
Hope this helps.