hi Alex, from www.support.xerox.com you should be able to select COPY BOOKLET - see below - good luck!
NOTE:Only landscape (Short Edge Feed (SEF)) oriented paper may be used to make booklets that are folded and / or stapled. Images will be automatically reduced to fit the selected output paper. If the number of pages in the booklet is not a multiple of four, the remaining pages will be output as blank pages.
We have a Xerox 4112 at work and we frequently make booklets. I know how to create booklets from single letter sheets, but we need to know how to reproduce another booklet from a booklet.
In other words, how do I copy a booklet (with the staples removed, 2 pages printed on each side of tabloid sheets, arranged to create a booklet) and produce a new, identical folded and stapled booklet.