--- synaptics tip & trics and parameters ---

edit your xfree/xorg configuration file as described in synaptics
documentation. You can find two example of configuration for mouse
devices at the bottom of the page.
remember "synaptics" in module section!!

(re)Start X and fine-tune parameters with synclient (you can
find it in synaptics's source dir). if you like the "notaptyping"
option of pbbuttonsd you should try also syndaemon.
a good start could be:
howl:~# /usr/bin/syndaemon -d -t -i 0.4

download synaptic parameters