Your graphics card should be supported by the nvidia legacy driver 173xx.

Package: nvidia-kernel-legacy-173xx-dkms http://packages.debian.org/en/squeez...acy-173xx-dkms

You should be able to install the driver by issuing
Code:
sudo apt-get update
sudo apt-get -t testing install nvidia-kernel-legacy-173xx-dkms nvidia-glx-legacy-173xx
After installation the cheatcode xmodule=nvidia should work.