The design team I'm on has an architect who has created his own custom room tag, Instead of using room name for the room name, he created a custom one called room description.

Now when I link his model, make it room bounding, add my spaces and use the space naming utility, all the rooms have no name, because the room name value is blank.
He says its too far in to change it, having named almost 750 rooms, so is there a way I can set up a formula in the room tag to have Room Name = Room Description.
If not there is no way I'm filling in this information manually, so all our drawings will have no room names on them.