SC2Mapster

Hello everyone! Got a question for ya:

So I've recently decided to get into Sc2 map making, and I'm working on a third-person shooter project. As part of it, I'm changing the scale of most of the units and doodads to be more accurate to what they would actually be. However, I'm planning on making multiple maps with different types of terrains, which leads me to my question.

I've created a single map that has all of the data (including the scale of my units). It's currently on the Korhal City map textures, but what I'm wondering is if I could change it to, say, one of the space platform maps. I'm aware that you can swap/add texture sets, but that doesn't change the cliffs, or turn it into an actual space platform, if you understand what I'm getting at. So is there a way to change the entire terrain to a different set like the space platform, or would I have to create an entirely new map? If it's the latter, then is there a way to save the data as a dependency/mod so that I could load it into a new map when I create it, without having to manually change the scale of all of the units every time I create a new map?

How do I save the data as a mod? I'm aware I can make a new document as a "Dependent Mod", but if I already have the map with the data that changes all of the units' sizes, how do I save that data as a mod? I'm very new to a lot of this, so specifics would be greatly appreciated.