I DO NOT USE GIMP ANYMORE. IF YOU HAVE A PROBLEM, I DON'T KNOW HOW TO FIX IT. I'M SORRY.
I made this because I don't see many tutorials out there for GIMP that has to do with inking/layers. GIMP is a free photo manipulating program that is very close to Photoshop... but free! :D
Enjoy and use to your hearts content.