Yes, sure, i will try my best with my poor english knowledge...
I would like to install a HIS X1900 XT. First, I have installed .NET Framework 1.1 and then the catalyst 6.3. There was no failure so far. But in the device manager, the graphic card has a yellow (!). Even when I have deinstalled the graphic card in the device manager and rebooted the pc, windows says, there was a problem installing a device (graphic card).
To the audigy 2. I forgot to tell you, that I have an audigy 2 ZS Video Editor. And so far as you could see, there is no x64 driver for this device (a point, I do not understand). So, for me it would be probably the best to deinstall XP 64 and install the normal XP...