Ah, see, you don't have to do all that. Just open your map up in map maker and hit 'export.' The game will export the map as a .fhm, then export the object files as .fho. If you have sky and such it will export it as .fhs, ect.You send those files to your friends. (The portals thing didn't have a size, cause, well, you don't have any portals in there besides the one that leads to teh cape)