i am a newbie!

i have the following graphic card:Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 03)

i think appropriate drivers are installed at the time of installtion!
but the compiz (desktop effects) are not working!

i have installed nvidia-settings!
it says:

You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run `nvidia-xconfig` as root), and restart the X server.

then i tried to run "sudo nvidia-xconfig" but it says"command not found!

thanks in advance

It's not going to work. You can't install nvidia X driver on an Intel gfx card.

Sorry, don't have time to research it now, but try to google: 82845G/GL compiz