I'm not positive about this, so make sure to BACKUP FIRST! Then find the source type you want to edit by scrolling through the Existing source types list in the source template window. Double click to open and make the changes you desire. Click okay and save with the name you want to call the template. The reason I'm not sure of this is because of the ROOTS III import. However, it seems that I did do that once "eons" ago--:) Again, if I'm wrong, I'm sure someone else will pipe in.