I would have thought that the lists of current objects would be sufficient, and then the individual sprites can be generated based on the resulting 3D models when the requirements have been fixed.
I would also be wary about insisting that every single object from the original game is recreated - if people can do better (and it appears they can) build a suitable selection which can be different from the originals.
Oh, but the Edinburgh University building (the tower block with the narrow base) has to be created again!
