You could upload them under scenery, since that's what they're related to, and explain in the download details that the files are libraries only and one would need a placement tool to make the objects show up.
I can see why they may not be much to choose between at the moment, but when you start creating more objects it will make your life easier to add them to a library to ensure that you always have the latest versions of an object.
I think it would make sense to create a lib.
Steve _______________________________________________________ Quid Si Coelum Ruat _______________________________________________________