$$$$   XF86Config 부분 수정   $$$$
 For XFree 3.3.x users:
 Section "Pointer"
   Protocol             "IMPS/2"
   Buttons              3
   ZAxisMapping         4 5
EndSection
_____________________________________________
 For XFree 4.x users:
 Section "InputDevice"
    Identifier  "Mouse0"
    Driver      "mouse"
    Option      "Protocol"        "IMPS/2"
    Option      "Device"          "/dev/mouse"
    Option      "ZAxisMapping"    "4 5"
EndSection