Well my guess is you need 2 hardware profiles one with touchpad one without.
To create another profile
System properties (windows+pause)
Hardware tab
click on the hardware profile buton
create another profile named "without touchpad"
reboot
choose this profile
System properties (windows+pause)
Hardware tab
click on device manager
disable the touchpad driver
it should do the trick.
Ps : it's 200K€ per tips