copy units and abilitys to diff map

[Overseeing Peon]

My friends and i are working on making a campain. Not like the ones in War3. This is the sort where there is a big map with various territory and each territory is fought for in a standard melee match. Anywoo enough background each person has a hero the made themself using standard skills which have been altered and various skins and models. All of the Units are in a single map. what im trying to do is find a simple way to copy all of the units into a different map, such as one of the Blizzard made maps.