Comment Re:The Solution is Obvious (Score 1) 829
Actually, XP x64 just used WS2K3 x64 drivers. So hardware you would find in and connected to servers and high-end workstations (network cards, RAID cards, office and enterprise grade printers and scanners, workstation video cards) tended to work just fine while consumer gear (cheap printers, scanners and multifunction devices, gaming video cards) tended to be quite hit-and-miss.
The situation improved when Microsoft started forcing hardware manufacturers to support 64-bit in order to get the "Made for Vista" branding, but only for devices where the driver interface didn't change significantly. I could install Vista x64 drivers for my scanner on XP x64 by modifying the INF file and forcing it to install. That wouldn't work so well for a video card.