How to turn of touchpad on laptop?

[Joerg Johannes <liste_joerg@gmx.de>]

Hi everybody

I'd like to turn off the touchpad on my laptop wehn I have an USB mouse 
plugged in. In my XF86Config-4 I have configured two pointer devices:
        InputDevice    "PS/2 Mouse" "CorePointer"
and
        InputDevice    "USB Mouse" "CorePointer"
Is there a way to turn the "PS/2 Mouse" off (and back on) when X is 
already running?

Thanks
joerg

-- 
Gib GATES keine Chance!