Replace Map Terrain

Hi, I've searched the internet and this forum for an hour and haven't found an answer, so I'll ask.

How do I replace the terrain in my map entirely? I want to replace the terrain with that of another map, keeping the triggers and custom units/abilities and placed units intact. What files in the w3x do I need to replace?

Nevermind, I got it. I first used the 'export all data' feature in the object editor, imported the data into the new map, saved, then extracted a bunch of files from the original map with WinMPQ and replaced them into the new map.

I'll close this then, but next time don't double post, use the edit button.