I would actually use driver cleaner first to remove the old one and try to install 71.84 again. http://www.nvidia.com/object/winxp-2k_archive.html
Thats the Nvidia XP driver archive.
those grey trees you talk about might not be fixed. My parents 2001 dell came with that card, what a piece of junk. its hard to run any program on that card. I prefer the Radeon 8500 series over that one.
you might want to replace the vid card.
Channels are #freedom and #forums.amd.irc.
Unofficial chat on both.
Rigs: AMD 3700, MSI RD 480 Neo 2, X850Xt, 2GB GSkill
Dell Latitude D810, Pentium M 740, 128MB (ded.) X600, 2GB Crucial
AMD 3200, GB K8NS Ultra, x800xlaiw, 2GB Corsair.