Hi,
Add this to your xorg.conf to Section "Device" :
Option "RenderAccel" "True"
Option "NoRenderExtension" "False"
Option "NoFlip" "False"
Option "UseEdid" "True"
Option "NvAGP" "1"
You can make a simple script (just say FBSDin20Steps) in your home directory:
#! /bin/sh
compiz...