Making custom brushes in Sketchbook Pro

I've been using Sketchbook Pro for digital painting lately, and since it took me a little research to uncover how to do this, I thought I'd share it with everybody. Hopefully it's useful to someone. Please forgive the crappy audio, I had to resort to using my laptop microphone, so fidelity is pretty much awful. In the future, I will do better, promise! Check out my sketchbook at:   / www   and my Illustration website at: http://www.seaboltillustration.com