Option "DesktopSetup"  "horizontal" #Enable Big Desktop
Option "Mode2"         "1280x1024" #Resolution for second monitor
Option "DesktopSetup" "LVDS,AUTO" #the types of monitors that is connected LVDS = LCD, CRT, AUTO
Option "EnablePrivateBackZ" "yes" #Enable 3d support <= May Not Work
Option "HSync2" "65" #This sets the horizontal sync for the secondary display. 
Option "VRefresh2" "60" #This sets the refresh rate of the secondary display.