
Issue finally fixed with the official 81.95 driver
http://www.nvidia.com/object/winxp_2k_81.95.html
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There is a new official MS whql driver from nvidia.
I went through the release notes and found this.
Open Issue at moment (aka there aware of it)
GeForce 6800 Ultra: Textures are corrupted upon the first time
entering a zone in Guild Wars.
This was the only issue with GW mentioned in the release notes.