Congratulations Ido and +rep for that!
You might not have been the first one to have that idea
but you were the first one to pull it through. Great!
Concerning the copyright problems: maybe the only feasible solution would be if the artworks were not "content" of a frame -- at the moment the pictures are still named after the frame they are put into -- but "objects" with the name of the painting and the artist put on them (as
MA did it with Karadi's or Kostabi's painting in the New Oxford Gallery). Only then you could restrict the number of copies available and could have some "proof" of authorship.
I am afraid
MA has other priorities, and it would be a lot of work to provide budding artists with that opportunity. As it stands
MA probably thought of "Signs" rather than of artworks. Let's try to make the best of that situation anyway. Go on with your work Dido! Others will certainly follow
Glyphan