Hi, and welcome to LQ!
Ad 1) Been there, done that?
A few of the links look very promising, even though I
can't verify they'd work since I don't use SuSE or the
Ad 2) Most more recent wheel-mice will be a IMPS/2
model ... if changing to that setting doesn't have the
desired effect try adding the following line manually
to your /etc/X11/XFree86.conf
Option "ZAxisMapping" "4 5"
in the Section "Input device"