You didn't make it really clear, are you trying to create rooms in Poser? If thats the case... As a long time Poser user and a somewhat accomplished set creator, I would have to say don't even waste your time trying to build sets in Poser, unless you enjoy pain and suffering! :) You'd be much better off getting a 3d Modelling program, even an inexpensive one, to create sets and props. It is much much easier.