Hello leeo,
I see no one has responded to this post yet. So, at this point I would recommend contacting your local Xerox Support Department to speak with a Product Specialist for more assistance. Please call 1-800-821-2797.
Is it possible to choose an imposition source when selecting \Document Options \ Page Layout \ Booklet Creation \ Booklet Layout? Or is it only possible when using Booklet Fold and Booklet Fold & Staple? Thanks in advance for any tips!