NVIDIA has ceased driver support for GeForce FX series.
You don't have to worry about that, just get the latest drivers that were released and you will be fine.
Windows 9x & Windows Me: 81.98 released on December 21, 2005
Download at
http://www.nvidia.com/object/win9x_81.98.html
Windows 95/98/Me
Download at
http://www.nvidia.com/object/81.98_9x_supported.html
Windows 2000, 32-bit Windows XP Media Center Edition
Download at
http://www.nvidia.com/object/winxp_175.19_whql.html