other mouse

Hello list, I have set up a machine in my little workplace to run SuSE 7.3 with graphics. I used standard screen and a scrollmouse. When i put up the machine in some other place with a different (2-button) mouse, I have problems with graphics. I have already started yast on a console, and changed settings (2-button mouse now works ok with gpm), but mouse does not work correctly in graphic mode. Fired up yast2 in console, but there are no settings possible for mouse (?). How do i get another mouse working in graphic mode?? TIA L1