Well, I guess the question is, are they hard coded or not?
If they are not, then I guess we would need to find how the game creates the .MAP files, and what program opens them, then find where the heightmaps are stored in those files.
Just out of curiosity, has anyone else had the RRT2 map files appear as MP2 files? I think all the maps that come with the game (I have the Platinum Edition) are like that, and the ones I've added from other users are .MAP. I don't know what causes this, although the game works fine with both file formats.
I don't drive a dogsled to work, I don't live in an igloo, and we're the SECOND LARGEST COUNTRY ON EARTH!!!