I have been reading about Guest Mail boxes in a Partner Mail VS R4.1. Is it true you can assign a guest mail box using the extensions in the slot populated with the Partner Mail VS module? For example I have a Partner II. The voice Mail module resides in Slot 4 of the expansion carrier. Those mail boxes are 52 through 57. I can assign as many as six guest mail boxes? How is that possible, when you assign extensions 54 through 57 to interface the Partner II to the voice mail module?