Create Booklet PDF service (Mac OS X)

I used this tool to print an A5 document as booklet with staples and four pages per sheet on Mac:

http://www.macupdate.com/app/mac/21068/create-booklet-pdf-service

This worked for me from Word 2011 on Mac OS X Lion 10.7.1 and probably works for any other program as well as this is a universal PDF service (Create Booklet in the PDF menu button in every print dialog).