Hi. I'm a total noob at this, so please take my input for what it's worth.
I saw in the "Tobasco" tutorial a portion where they used endomorphs to fold the box. You can scrub through the movie for that part (it's near the end as I recall). I tried it in the toot, and it was quite easy.
A folded box is similar enough to opening a book. Perhaps this will help? Good luck!
http://www.simplylightwave.com/movie...tml?tut_id=502