I wrote a Linux driver for this crappy device, it can be found here: https://github.com/daedric/cntouch_driver
I've also submitted it for review and merge.
Next time I buy a laptop from LDLC without OS (if that happens), I'll think twice...
EDIT:
There are only events for:
- click (or double tap with one finger, same event is generated);
- right click;
- horizontal wheel;
- vertical wheel.
There is no event for a tap with two fingers (usually to simulate a right click).