More Terrain Skins? How?

How can I get Terrain from other places like Felwood and Ashenvale or is it all the same from Lorderon Summer. I doubt though hehe.

Under the tools menu, you'll find a sub-menu that reads 'Advanced Options'. In there, you'll find a selection called 'Modify Tileset'. Go into that, check the box that says "Use Custom Tileset" and you can mix-and-match your tiles. Note that cliff-tiles (IE, grass and dirt in Lordaeron Summer) cannot be altered. These are marked by a Red box in the corner.

Thank you.