Hi,
I have just some problems with such a card in Ubuntu 6.10. Its possible to install the newest Nvidia driver with the ENVY script:
http://albertomilone.com/nvidia_scripts1.html
in the german Ubuntu forum there is a thread about this card:
http://forum.ubuntuusers.de/topic/75993/?highlight=
if you have problems with installation of Envy, please ask.
best regards svgt