Hi everyone, I'm new here
Thing is, I'm making a boardgame, and this site has been a tremendous help!

However, I can't seem to find any info on how to make area / region borders on an existing map?
What kind of areas/regions? Well, similar to these:
http://www.gamesetwatch.com/wow4bg.jpg
http://www.gamesetwatch.com/wow2bg.jpg

Any help would be appreciated!
I'm using GIMP and Inkscape.