Yes, I guess this is possible, but it is outside of the realms of the requirements for a shipping module. It probably isn't going to be *difficult* to do either, Theory dictates that it is just a matter of identifying which of the many zencart files is responsible for product duplications and modifying the code to include the additional fields.

How would this be done though? (which files etc) I am only just learning PHP / Zen Cart etc.

Kind Regards