Speaking of The Vault, I’ve just opened the Vault-Tec Labs, a wiki dedicated to Fallout series modding (modding documentation and tutorial, mod and tool database etc.)
It might have a potential especially if Bethesda releases a Fallout 3 construction set.
It’s an excellent idea, but remember Emil’s words regarding the availability of a construction set:
We don’t know yet – we’re discussing it. It is something we’ve done for Oblivion, but this doesn’t automatically mean we’ll do the same for Fallout. The truth is, preparing such tools takes a lot of time, and this is time lost to production of the actual game. We shall see.
Good luck Ausir.