How to configure glidepoint driver for touchpad?

I had the same problem on my Latitude 6430u (pre-installed with Ubuntu 12.04) : although the touchpad completely worked (I could even "pinch to zoom") I couldn't configure it.

somewhat solved it by installing a fixed ALPS driver :

• donwloaded the driver from http://www.dahetral.com/public-download
• extracted the tarball with tar xvjf psmouse-alps-1.3-alt.tbz and copied all sources to /usr/src with sudo cp -Rvup usr /
• /usr/src/psmouse-alps-1.3/alps.sh dkms_build_alps
• I also had to uninstall the debian package "glidepoint"

After rebooting the "touchpad" tab is back in system settings and allows me to configure a perfect two-fingers scrolling. Looks like I lost the pinch-to-zoom but I don't need it...