Well put in your live cd, press "try ubuntu without any change to your computer", When it is done loading go to /media. Your hdd should be mounted in there, see what it is named (probably disk). Then open a konsole and type
sudo gedit /media/disk/etc/X11/xorg.conf
It should open up xorg.conf and then you can copy it and paste it here. If your disk wasn't named "disk" replace "disk" with whatever it was named.