Like Art said, set up your config to slave Z and C then:
The drop a "Button" on your screed that says "Swap A and C" for the label
In the button put the VB script: swapaxis( 3,5)
Drop another button on your screen with "reset A and C" for the label
In the button put: ResetSwappedAxis()
If you don't want to fool with it, send me your screen set, and mark the area you want the buttons and I will do it for you.
email: poppabear (at) hughes.net
Scott