[newbie] How may I use two mice?

[Phil R Lawrence]

I want to use two mice at once (one is a touchpad in my keyboard).  

Currently, DrakConf reports them as:
    Device: /dev/psaux
    Bus Type: PS/2
and
    Device: /dev/ttyS0
    Bus Type: Serial


My XF86Config-4 currently says:
Section "InputDevice"

    Identifier "Mouse1"
    Driver      "mouse"
    Option "Protocol"    "IMPS/2"
    Option "Device"      "/dev/mouse"
    Option "ZAxisMapping" "4 5"

EndSection

This results in the serial mouse working.  How may I use both mice?

Thanks,
Phil R Lawrence