8 button mouse. (logitech mx 700)

[Janis Hagelberg <janis.h@freesurf.ch>]

hello!
i've just bought the new logitech mx-700 optical cordless wheel mouse.
the "problem" is that it has 8 buttons, i.e. 3 extra buttons.
but i d'ont know how to give those three additional buttons any function, 
like launching konqueror, or switching windows.
here is my gpm.conf and my xf86config-4, with the three usual buttons plus 
the wheel working perfectly. 
(i'm using sarge)

gpm.conf:

device=/dev/psaux
responsiveness=
repeat_type=raw
type=imps2
append=""


xf86config-4:

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"		"/dev/gpmdata"
	Option		"Protocol"		"ImPS/2"
	Option		"Emulate3Buttons"	"false"
	Option		"ZAxisMapping"		"4 5"
	Option          	"Buttons" 		"8"
EndSection