I recently thought of a addon Idea; i dont know if it's been done but I was thinking of a ship capable of carrying tanks, helicopters, cars, troops, etc. in it's cargo hold. Bassically, a cargo ship using a simmilar cargo script as BAS's MH-47e cargo helo.
I was thinking of a ship like a LST (only a bit bigger) that can carry alot of troops, as well as secure helicopters on it's deck and hold tanks in the cargo hold. animate ramps and such so you can drive the tanks up into the ship, then secure them in place.
Also, it would be useful to aplly similar scripts to a cargo plane such as a C-130 with the abillity to air-drop cargo. That way you could deliver suplies (or vehicles like Humvees) SF units already on the ground... And you dont just have to apply it to suplies, take a look at the post on Daisycutters and you'll see what i mean... ;D