[asheshouse]

Yes. -- Should be relatively easy to do.

Take one of the original map file sets and set it up with a new name.

Use Photoshop or Gimp or whatever to increase the size of the "canvas"

Paste in the map images from the other map set.

Sort out the positions of the scenery objects.

---- done

--- probably not that simple but probably not much more difficult.

Sort of like this -- sorry theres a few islands missing

That image is 538.4x871.1km -- Pretty big but mostly sea. Maybe too big to work properly in the game, but only one way to find out.