There is something strange about those models, I wanted to use the chair (which is a wooden chair anyway, not the office chair that shows up in the documentation), I opened the .obj in Poser and it came in all faceted, like a 3DMF file comes in. I took it in Max to try and smooth it, it wouldn't smooth - then I noticed there were 15,000+ vertices! I did a low-setting weld and that dropped to about 3,000, and then it would smooth. There is something really strange about those models, though.