Scaling is a matter of using 3Dmax, and I have found you first convert the model (.mod) into a .3ds file, open that file, go to that little hammer icon on the faaaar right, then find Add More... look in this and you'll see Rescale World Units. Rescale the selection, not the whole world or whatever. It does so in degrees. Now, save that altered .3ds file as a.mod of the same name. It will show up in-game, but needs to be a new campaign or skirmish.
As far as adding names to ships, to get rid of the ???, you just add a Text document, not a Notepad, a Text document in that folder... the text document having the same name as the folder as the model. In that text document, you'll type whatever you want to show up in the ship library.
Does this help?