I also notice the same problem. I have an HP8710w laptop that has an FX1600M GPU. It is listed as supported in the 2.0 documentation. The version I am using is 174.55. Here is what the system information utility reports.
Any help would be appreciated.
[Display]
Processor: Intel® Core™2 Duo CPU T7700 @ 2.40GHz (2393 MHz)
Operating System: Microsoft Windows XP (Service Pack 2)
DirectX version: 9.0c
GPU processor: Quadro FX 1600M
ForceWare version: 174.55
Memory: 512 MB
Video BIOS version: 60.84.56.02.02
IRQ: 16
Bus: PCI Express x16
[Components]
nvCplUIR.dll 1.5.100.48 NVIDIA Control Panel
nvCpl.cpl 1.5.100.48 NVIDIA Control Panel Applet
nvExpBar.dll 1.4.130.0 NVIDIA Control Panel
nvCplUI.exe 1.5.100.48 NVIDIA Control Panel
nvWSSR.dll 6.14.11.7455 NVIDIA Workstation Server
nvWSS.dll 6.14.11.7455 NVIDIA Workstation Server
nvViTvSR.dll 6.14.11.7455 NVIDIA Video and TV Server
nvViTvS.dll 6.14.11.7455 NVIDIA Video and TV Server
nvMoblSR.dll 6.14.11.7455 NVIDIA Mobile Server
nvMoblS.dll 6.14.11.7455 NVIDIA Mobile Server
nvDispSR.dll 6.14.11.7455 NVIDIA Display Server
NVMCTRAY.DLL 6.14.11.7455 NVIDIA Media Center Library
NVOGLNT.DLL 6.14.11.7455 NVIDIA Compatible OpenGL ICD
nvDispS.dll 6.14.11.7455 NVIDIA Display Server
NVCPL.DLL 6.14.11.7455 NVIDIA Compatible Windows 2000 Display driver, Version 174.55
NV4_MINI.SYS 6.14.11.7455 NVIDIA Compatible Windows 2000 Miniport Driver, Version 174.55
NV4_DISP.DLL 6.14.11.7455 NVIDIA Compatible Windows 2000 Display driver, Version 174.55
nvGameSR.dll 6.14.11.7455 NVIDIA 3D Settings Server
nvGameS.dll 6.14.11.7455 NVIDIA 3D Settings Server