xrandr 1.2

Added this to xorg.conf:

Section "Screen"
     Identifier      "Default Screen"
     Monitor         "Configured Monitor"
     Device          "Configured Video Device"

        SubSection "Display"
                Depth   24
                Modes   "1600x1200" "1400x1050" "1280x1024" "1024x768"
                Virtual 3000 1200
        EndSubSection
EndSection

Restarted X

Ran this as joe-user:

xrandr --output LVDS --auto --output VGA-0 --auto --mode 1280x1024 --right-of LVDS

and voila, dual display.