Image map in pier

Hello group, I am planning on writting an image map component for Pier. Has anyone heard of someone else doing something like this? I am assuming no and going ahead and building one. :) But the problem I am having is that I want the component to be configured via the settings command from inside Pier. I need a way, from the settings page, to be able to add coordinate->image file pairs. The logical representation to me seems like a dictionary. I have read all the tutorials I can find, and went through the source code, but I don't see how one does in this Magritte. Can anyone help me out on this? Thanks, az