Charles, isn't your board an nforce3 or nforce4 chipset? If so nvidia has 64 bit drivers available for everything on your motherboard.
Nforce3 64 bit drivers:
http://www.nvidia.com/object/nforce_udp_winxp64_6.25
Nforce4 64 bit drivers:
http://www.nvidia.com/object/nforce_nf4_winxp64_6.39_beta.html
Also your video card might still work. Try using the method I suggested for installing the vid card drivers. But look at the lines for the 9500 series or something like that for reference and then just kind of copy those lines in the list of cards. Then edit the beginning part to say "RADEON 9200 series". Then after the lines are in like that change the IDs like I put how to in my steps. It might still work since it worked on my card which isn't supported either.
EDIT: I just looked up your motherboard. It is indeed nforce3 chipset. There are 64 bit drivers available for that motherboard via the link in this post.
Nforce3 64 bit drivers:
http://www.nvidia.com/object/nforce_udp_winxp64_6.25
Nforce4 64 bit drivers:
http://www.nvidia.com/object/nforce_nf4_winxp64_6.39_beta.html
Also your video card might still work. Try using the method I suggested for installing the vid card drivers. But look at the lines for the 9500 series or something like that for reference and then just kind of copy those lines in the list of cards. Then edit the beginning part to say "RADEON 9200 series". Then after the lines are in like that change the IDs like I put how to in my steps. It might still work since it worked on my card which isn't supported either.
EDIT: I just looked up your motherboard. It is indeed nforce3 chipset. There are 64 bit drivers available for that motherboard via the link in this post.