To answer your questions: -Vue does not support 64 bit processors, though I would expect that in the future it will once the 64 bit OS is out there. -Vue 5 and 4 Pro support dual processors but I don't believe Vue 4 Esprit does (see later in this post for why). -Can't help you too much on the video cards, I haven't had any problems with my radeon 9600 but I seldom actually run in open gl mode (the only time a video card matters) due to large scene files that tax the system as a whole way too much. -Your fine for Vue 4, but then again Vue 4 is practically ancient at this point (I think it's been about 5 years or so since it was released) so I would definately consider upgrading to at least Vue 5 Esprit as your current system is more than addequate for Vue 4. Hope this helps.