Guru3d have released a new version of the tweak tool called nVHardPage. Quotes from Guru:

Do you seek an easy way to en/disable overclocking options or vsync option in your detonator drivers without the burden of importing registry entries or the need to go in that registry yourself ? Basically CoolBits and more within your fingertips.

This program serves on enabling/disabling hidden features in nVidia control panel and tweaking nVidia Direct3D & OpenGL settings.

Supported OS: WinXP, Win2k, Win9x/Me - only CoolBits & Display orientation at the moment.

Supported Drivers: Detonators 21.81 and higher.

What's New?

Added display adapter info

Added vertical sync (D3D)

Added full list of Direct3D and OpenGL settings

Improved support for Win9x with 22.80 and lower detonators (not tested and without detection)

Updated D3D anisotropic level

Updated D3D AA settings

Fixed ogl_renderqualityflags bug

Fixed bug with detection settings under Win9x

Fixed W-buffer, 24b-zbuffer, D3D LOD, Fog table and user mipmap settings under Win9x

Fixed bug with detection card name under Win9x with onboard graphic card and nVidia card in one PC

Some other small fixes

Download nVHardPage v0.90.1b