Custom Cliff

How can I put a custom cliff on a map?

I donwloaded it, but I dont know how to insert.

EDIT: Oh yeah, It is one .blp and other with unknown extention.

I don't know for the unknown extension, but like other skins, you should replace the .blp file. The page where you downloaded the custom cliff should also display the path for it.

I had downloaded the Konstrukt Kit of Talon the Mage.
The unknown file is a blp, but Talon the Mage forgot to add the .blp extension when "saved as"
I already fixed it.
Thanks.

There is a good tutorial here at http://world-editor-tutorials.thehel...t/tilesets.php
I used it to replace "building cliffs" and a few others in my map. I used gimp and several layers, like cutting some regions, selecting by color, then applying filters and merging the layers, etc.
Cliff tiles are stored in a different way than normal tiles, but that link explains it in detail.
I used Wacraft3Viewer to convert to/from blp/tga, but there are other ways to convert...