So, if I understand correctly, I could use 2 TH2G using both outputs of a single card on 6 1280:1024 monitors horizontally spanned as 1 display to reach 1 desktop image at 7680x1024. Is that right, and can it be done on analog TH2G's and in Vista? Flight Simulator X doesn't utilize SLI as far as I know, so I'm not concerned about not having it on all displays. Thanks again!
FSX is a bit of a different animal as far as 3d is concerned. It doesn't behave like other games and has some key differences. In general, yes 6 1280x1024 will work in any 3d game, but only in XP span mode. They removed the span modes in Vista unfortunately. My setup examples are geared towards more generic gaming, where it'll work with most any opengl or directx 9 game. FSX is rather unique in the way 3d works with it and has it's own set of rules. If you're looking for another TH2G analog, I have one I'm thinking on selling.
To get the best answers about FSX setups I'd recommend checking out http://www.mycockpit.org