When we move to Steam, can we hope that it would be smart enough to reuse (rehash) existing data files or would it still need to download a gazillion gigabytes? It makes from an engineering perspective that it does, unless the Steam API requires (or recommends) a different packaging method. Either way, would like to know. It's not a big deal, but if I can start playing at launch as opposed to an hour or two later, it would be appreciated.