3DWin2000 has posted a tip which enable TV Out on GeForce based boards. This has been tested on a 3D Prophet DVI DDR.

Download ASUS Windows 2000 3.79 Beta 1 Drivers
Download NVIDIA Windows 2000 3.78 RC Drivers

You need the follow files from the Asus drivers:

V66_DISP.DLL
V66_MINI.SYS
V66GLNT.LRC
NVINSTNT.DLL

You need the follow file from the NVIDIA drivers:

NV4_DISP.INF

Copy all files to a temporary directory and rename the follow files:

V66_DISP.DLL -----> NV4_DISP.DLL
V66_MINI.SYS -----> NV4_MINI.SYS
V66GLNT.LRC -----> NVOGLNT.DLL

Install the "new" drivers with NV4_DISP.INF