You don't know that my script installs nvidia drivers on U too?
Be sure that you always run the lastest script to get support for latest driver versions. Additionally my script will configure dkms which the default nvidia-installer does not. That currently does not work with pure squeeze/sid, therefore you would need "-m" option there. To use more than 1 monitor add "-d". All drivers have been tested that are enabled (fully automatic driver selection) - it will just not work when you need a 71.xx series driver and use a too new xorg.
rm -f /etc/X11/xorg.conf*
wget -N http://kanotix.com/files/install-nvidia-debian.sh