I posted a thread in the CL forum regarding this. Why don't you hold off on doing any more on this for the moment, if we decide to go the route similar to the Challenge Entry Archive we'll let you know what information you need to gather.
That we can avoid wasting space by having the files duplicated.
Okay, I'll hold off on the posting. In fact, the way the Challenge Archives are set up would be better suited for this, I suppose.