Although labeled beta, NVIDIA just released a new official driver, this is ForceWare 65 with build 67.03 for Windows 2000/XP.
The drivers from NVIDIA are 14 MB in size, on Guru3D.com server you'll notice a smaller (8 Megabyte) download size due to some better compression. The drivers have been pest and virus checked them and they turn out quite alright which makes sense as they originate from NVIDIA's servers.
Should you give them a try then let us know in our discussion forums what you think about them ! The release notes say that these are the 67.02 but with a single bug with 6600 cards fixed.