Once all sides of the crate have been attached to the layout, I set the top piece in place, and attached it with more long drywall screws. Then, I lifted the crate off the bottom piece (which wasn't attached yet), and set it on it's top, so that the bottom was facing up. I made sure that all of the wiring and plugs were tied down and situated so that they wouldn't get pinched, then set the bottom piece in place, and attached it with more drywall screws.
The result is a crate that is stiff and strong (I can stand in the middle of the crate, and it supports my weight), and can travel or be stored on it's bottom, side, or end. It came through the first move in perfect shape, and I expect it to come through this move in good condition. Well, I expect some foliage to come loose this time, but that can be easily repaired.
I will report on the layout condition when I unpack it, which isn't expected until after April, 2005, unfortunately.