when making a skin ull need these goto TOOLS and download - wc3 viewer - wc3 image extracter - and a good art program
photo shop or unleead is good tool ---------------------------- - simply go into image extracter fined and save a image u like to work on in a folder - then use ec3 viewer to change the image to a file type readable to the art program - then change it back to .BLP by useing wc3 viewer again - import it to your map and change the path to the correct path.