Thanks for your comments.
I have now actually managed to align the document in the right order, from right-to-left, and it works fine.
However, I have one more quick question:
I would like to fix the document so that it will open in a two-page view, regardless of the personal definitions of the reader's Acrobat Reader. In other words, I want the document to open as I have now designed it, and not to allow any changes in layout and viewing mode. How can I fix this feature?
Many thanks in advance,