Interesting idea, but make it:
I wish for the ability to create a .res file in the Skin Viewer.
We would really need to be able to create the individual res files in the skin viewer.
I believe it's actually possible now, as I have seen a couple of different versions of a skin I'm working on in the hanger, but it requires the raw source files and that's the problem right now for your scenario. No one is going to create a whole set of high quality skins for an event, and then give away the source files.
Additionally, I would not like to see a package of hastily constructed skins for an event, and quality builders are not going to distribute their source files. As someone who submitted a source file to the old skinning site only to see someone grab it and call it his own, I won't ever release one again. You can suddenly have 3 or 4 cloned versions of your skin running around and it cheapens the one you made. You do have me thinking about the possibility of distributing versions of the weekend wonders I include in terrains, but that has issues I won't go into.