Although you still can't spell because your still using spell check XD, I'll still help you.
Now, the only way for your friends to play on the map is eather make a server with mission editor enabled (has been done before but not recommended)
or, pack the map up, so it will show on your map selection list when you go to make a server.
How to take the snow out of slopes? well for now I'm just going to tell you how to change the the terrain of the map. To change that, go to terrain editor menu on mission editor.
For more information on map making/map editing, go here->
http://forum.blockland.us/index.php?topic=117759.0