Actually this was an easy one: Installing the drivers for the eGalax touch screen.
Just downloaded the latest drivers from:
Then unpacked with tar xvfz eGalaxTouch-3.06.5625-32b-k26.tar.gz
Then just ran as root (sudo su) the setup.sh script and calibrated the screen by running eGalaxTouch from the commandline as was dictated by the setup (after a reboot).
Now my finger can handle the computer. Just miraculous.
Some stats from this screen:
lsusb -v (exerpt from the output)
Bus 005 Device 003: ID 0eef:7390 D-WAV Scientific Co., Ltd idVendor 0x0eef D-WAV Scientific Co., Ltd idProduct 0x7390 bcdDevice 2.00 iManufacturer 1 eGalax_eMPIA Technology Inc. iProduct 2 PCAP MultiTouch Controller bInterfaceClass 3 Human Interface Device bInterfaceSubClass 1 Boot Interface Subclass bInterfaceProtocol 2 Mouse