Thanks guys! But when I tried the tutorials, it didn't work. Probably because I don't have Photoshop or Gimp, but I used Autodesk Sketchbook Pro 6, which is still a high quality art program.
Note: Good to know I can make maps based off of WaterMill though.

P.S. I still want to learn where to put any ones I download from the site in the link or ones I create myself...