Hi woodbiner: Too Change the Kuid No's..Open up CM2 or what ever you have..Find the listing of your engine, Right click on the name, go to Edit exployer..Click on it, Right click Con-Fig file..There will be two Kuid Tables, upper and lower(Bottom of Page)..click and hold to high lite Kuid No., Type in new Kuid No..Be sure and write Kuid No's down, because it is easy to be confused on the No..Be sure to Save and commit..Oh, make sure you click on open in con-fig file..