> But I now have another problem, im having real issue trying to program the J-PAC with > winIPAC
I wouldn't re-program the JPAC. If your button arrangement isn't how you'd like it to be, I'd change the wiring on your buttons on the control panel.
Keep in mind that for some games, the MAME default button arrangement isn't optimal with most fighter cabinet button layouts. For example, Mortal Kombat 3. For my cabinet, I just go into the internal MAME menu and re-assign the buttons for MK3.