cloned External monitor on a ATI mobility fireGL T2

kinda shooting in the dark here, but does anyone know how to disable the autopanning feature for an external video monitor connected to an IBM R50p with ATI mobility fireGL T2? I’m trying to clone the upper right 640x480
of the main display to 640X480 external monitor, only the monitor is defined as a 1024x768 and auto pans as you move the mouse cursor around. on a geforce with nview I can disable that mouse trailing, but I can’t find how to do that on the ati.