As far as I know Don and Judy are just a rework of the original Poser 4 man and woman, but subdivided to have a higher policount and regrouped and jointed in a similar way to Michael and Victoria so they could use their poses. They were also remapped to take Michael and Victoria textures. The Cubed babies are a rework of the Poser 4 baby too and they had to RTencode them to sell them because of that, if I'm not wrong.