Complicated semi coloring-book

I’m looking to create a character creator in the vein of Hero Machine. I want to allow users to select different components and then color the conglomerate image. I’m very new to flash (Using MX Flash 6), so I’m not sure how to accomplish this goal though I have a near identical program I developed in

I need help/suggestions with:

  1. Where do I create the fill layer to be colored? At the button for select and then just move it? Somewhere in the library? Where?
  2. How do I generate the outline to a pre-specified location to allow the object to be colored?
  3. I’m doing multiple layers allowing different component matches. I don’t have to have a movie clip of every combination, do I?