Walkabel problem...! badly need help !

okey i want some ships to sail with units upon them..i know how to make them walkabel. But if it is a doodads or destructibels you can't move them....and if it is a unit you can't make them walkabel...i badly need help !!! :( hope you understand sorry for my bad english...

It's pretty much impossible. If it's for a cinematic you can make the units fly on top of the ship, if not, it's going to be tough..