Blender Animation Toolkit (Questions)

Hi, I’m about a month and a half into Blender and just bought the Blender Animation Toolkit with the flex-rig tutorials etc. And I thought it was suppose to be a rig to use for your own characters and it just tells you how to rig the character they give you. Even though it’s not I love it, it’s really helpful with character animation.

But I was wondering if there is a way to use the rig on your own characters that you make.?

Hope I am posting this in the correct spot.