use different mouse/input devices in X.org

[Marco]

Hi List,

i've using a Notebook with touchpad which works perfeclty fine. However,
i'd like also to use in paralell an external via usb connect mouse. If i
configure this hard into X.org config
it will work but i stumble here on problems. First of all, i have to
shutdown the X.org Server to do so, and restart it. Secondly i was not
able to tell X.org to use both device, which
would be the touchpad and the external mouse.
Possibly there is a daemon i can run in backround which maybe handles that?
Anyone has a solution for that kind of problem or something to hit me in
the right direction?
As usual thank you in advance,
 Marco