In the mission file you need to eliminate all instances of "AddLandingRegion" for a particular map. I changed mine to "AllLandingRegion" but anything will do. You need to make sure you edit all instances for a map or players will only be able to land in one hangar. Some maps have 1 region, some have 4, not sure why.
Looking at the content of the space maps in the mission file it appears they were not all made by the same person, different syntax and methods are used in the later maps than in the earlier ones.