I just found this myself - no idea if anyone else has found this or not but, works perfectly!
I got another Zenbook and got Zorin17 installed. This one is a little different; the touchpad isn't a screen like on my other one. But, does have the number pad lights and input in the touchpad itself. Neat - but didn't work for a while before I started doing some research on it.
This is the driver:
I would suggest issuing sudo chmod +x *.sh before installing .. just makes things a little easier when installing I've found..
When asked y/N on installing - 'N' is the default so be careful, you want to enable all of these so enter 'y' instead of pressing Enter; because it will not run correctly..
There is one minor note to include - it may fail on the first install.. But, just issue ./uninstall.sh, let it do its thing, reboot, then rerun the ./install.sh script and should get going after that. Also, make sure to unplug any mouse / keyboard input devices.
Here's a shot of what I got going:
Comes in handy when using numbers a lot - most times I don't even have it active but, much better than using the number row up top! 