To install Nvidia Geforce 8400M GT Drivers on Commodore OS vision (So that you can get compiz and all the eye candy) do the following:

First go to the menu system..comodore extras..Install graphics driver, then:

1) Download Newest Nvidia Linux 64 bit drivers from Nvidia website for your graphics card

2) Open module blacklist as admin

sudo gedit /etc/modprobe.d/blacklist.conf

3) Add these lines at the end of the file and then save:

blacklist vga16fb
blacklist nouveau
blacklist rivafb
blacklist nvidiafb
blacklist rivatv

4) Uninstall any previously installed Nvidia drivers:

sudo apt-get --purge remove nvidia-*

5) Reboot your computer

Press Ctr+Alt+F1 to drop to shell then type:

sudo service gdm stop

(To stop X windows)

Then install the driver, for example:

sudo sh NVIDIA-Linux-x86_64-195.36.24-pkg2.run

(Type the name of your driver that you downloaded, not the one above)

Then type

sudo service gdm start

And boom