that's what we did on my HG serverI could send it to you to host if you want to host it, Brickitect. I don't really play this game anymore.i have a folder with all the add-ons that go with it. that's the old map. it looks better now, especially that empty snow areahonestly I doubt you'd be able to make a very good one. HG only works with a huge map and your building style is so detailed I doubt you'd get more than a few 64x64 plates done. mine isn't very pretty but it's very fun to play.
Tundra. Offers most diverse gameplay.