place a plastic packer in the bottom corner nearest the hinge, lying flat, place your unit inside onto the packer, put a packer at the opposite corner at the top so the unit leans against it, you may need to shuffle the unit across at the bottom to fit the packer in, after that, put a packer on top of the unit as far into the corner as you can, do the same thing at the bottom, repeat at the opposing top corner,, you will end up with the unit being held in 3 corners, this directs the weight towards the hinges and not on the opening side.
carl, August 2010