Just saw this @ Guru3D.

These drivers are the 29.42 WHQL drivers released earlier this week. The .inf file has been modified to support all refresh rates and will help people that are stuck in 60hz. All known Nvidia cards should work with these drivers.

Of course since the .inf file has been modified this driver is no longer certified and thus not WHQL anymore, during the installation Windows 2000/XP will make you aware of it. Give them a try when needed!

Download Nvidia Detonator 29.42 Refreshrate Fixed Win2000/XP