A family of Microsoft word processing software products for creating web, email, and print documents.
How many real books (150 to 300 pages) you have designed, finalized, published in different languages using Word 2007 that you are suggesting "best advised not to use "Book fold"?
What I have stated is based on practical use of Word 2007 which, with your limited perspective, you have failed to understand. Hence, it is pointless wasting time on this subject anymore.
I admit you are expert in theory but that is inconsequential.
I also admit that I made the mistake of even attempting to explain to you in my last reply looking at your 'assumption' that was way off the mark.