I don't know. I think I would leave it the way it is and put the cargo door in the aft. That way, you just place the pallet into one of the aft positions and then let it run to the front of the aircraft on it's own.
Saves cost and weight for a powered CHS.
Unloading? Just park on a hill. 
Last edited by 11Fan; 25th January 2007 at 00:23.
Reason: afterthought