[gentoo-user] How 2 disable synaptic pad (driver)

[James]

Hello, so I got xorg-server
working just fine on several machines.......(*!/#FFF....)

Now I want to disable the synaptic pad on a laptop.
The first laptop I want to do this to is working without 
any xorg.conf file nor a /etc/X11/xorg.conf.d/ dir.....

This chipset is a RADEON XPRESS 20M (5955)

So is this file the best one to try to disable the synaptic driver?
/etc/X11/xorg.conf.d/10-evdev.conf

Suggestions are most welcome as googling has not
produced much, related to xorg-server-1.9.2
and how to disable the synaptic pad (driver).

James