Please help with changing terrains.....

Please help with changing terrains.....

I want to change the terrain of a map. I want to make a winter Twisted Meadows but I dont know how to convert the terrains. You know it has Lordaeron Summer and I want to make it Icecrown Glacier.

Maybe you have seen TurtleRock PRIME or LostTemple PRIME? They have a Jungle terrain and Barrens.

I tried with WorldEdit Unlimited but as a result my map was corrupted and the terrains and doodads were scattered everywhere. It looked so different and corrupted. Can you help me use the Icecrown Glacier Terrains with my map ? Programs, anything ...

Go to Advanced and take modify Tileset, Etheir you add some tiles or so does you just change it whole...