Help importing Sky

How do I inport Sky to my map.
Sorry if it may be in the wrong Form but I did not know were to put it in at.

Well you can't actually import another sky, even if you had imported because it won't work, but you can make a custom-textured sky by replacing the texture/skin of an existing sky in your map.

Here is a tutorial that I've written myself, for making a custom sky:
http://world-editor-tutorials.thehelper.net/cat_usersubmit.php?view=74737

Read it step-by-step to get it's details!

Thaks alot

Thaks the info was vary useful. I gave you some rep for it to. Oh an if you could i have one more question. You know the Rexnar bonus Campaign, well you know how some parts of the Campaign you will go in a cave or off skreen and it takes you to a diffrent map and when you go back the first map stays the same. how would you do that on a map? I would like to know because I'm macking a map call Magic City (I know its a stupit name) and i'm running out of space plus i would just like to know. if you could help i will give you more rep. Thaks.

Try asking in the World Editor Help Zone. Look under the "game" options in the GUI trigger categories.

Also refer to this game cache tutorial to transfer stats, items, abilities, etc. from one map to another:
http://war3.incgamers.com/forums/showthread.php?p=584463#post584463