EDIT: Seeing as the assets for the game are all there on our computers, and we still have our costume/sentinel data, why not construct a facsimile of the costume editor? In this way, we could at least take back at least one of the best parts of the game.
ORIGINAL:Well, we've all got our costume data, but it's useless without the assets. If anything is hidden clientside, though, we could potentially remake a fascimile of the costume/character editor as a seperate exe a la Spore Creature Creator.