What's the easiest way to have a flip in a program? The only way I've been able to do it was to have 2 separate programs and then merge them together. I have found its hard to edit the program offline when they are merged together.
You can't get a probe in there and hit z-? or do you have a tp20 or other probe system that inhibits hitting z-? that would be easiest solution.
otherwise, you should read up on "equate alignment" in the help file, like has already been mentioned.