I am trying to make a flash game(actionScript-3 if it matters) to test what I learned so far. And, in the game, I want to make the character(a robot?) customizable. The first solution I found was to edit the character movieclip directy. Is it possible to edit a movieclip at runtime? If yes, how?
Try using multiple movieclips (for the head, body, legs etc). That way you can switch them out easily. Put them together in a Sprite container.