I don't know if this helps you, but I use seperate config for each "machine" by adding "-c plasma" (or -c router, or whatever) after the SheetCam.exe. That will keep each machine separate. Of course, I need to know which machine I am programming for before starting Sheetcam. Another option I have used is the moreposts (or manyposts) plugin. That lets me define upto three extra post processors (four total).