hi michael!

did you try this one? it's a bit DIY, but nevertheless

https://multitouchvista.codeplex.com/

"multitouch vista has two parts : the input manager and the driver. the driver is just a universal hid compliant device that takes input from multitouchvista input manager and sends it to windows (wm_touch). multitouch vista input manager then takes two possible inputs (multiple mice or TUIO). "

"MTVista takes x,y from mice (multimice mode) or TUIO data (x,y, speed,… in TUIO mode) and sends it to the driver, then windows interprets them as wm_touch as this is what the driver is supposed to output…"

http://www.tuio.org/?software

there are various TUIO Tracker Implementations available, but sadly enough not for the Logitech Touchpad (at the moment)..but there are apps for android/wacom bamboo/iphone

another solution would be something like

http://www.mimomonitors.com/products/mimo-touch2

from mimomonitors.com

all the best,
marco