Oh, I know your pain. I made sure this wouldn't happen to me by taking each packing layer out and placing it upside down one on top of each other. Then, when I was done, I put everything back, in order, into the box.
Alas, since you probably didn't do this, the best advice I can suggest is to refer to your manual. The unpacking instructions start with the items on top and works its way down to the bottom. You should be able to ascertain the order from the manual.
If you still need more assistance, you'll need to get a Scout owner to walk you through it (I have a Scoutmaster, so it might be slightly different), or else call VPI.
Good luck!