I believe DAZ cannot claim to support P5 because they never bought it...something to do with P5's EULA that everyone was so upset about. However, since P5 scenes are compatible with P4 (with certain exceptions), I'd imagine they'd open okay in DS. It is important to remember that the core of P5 is P4/ProPak. I--and many others--believe CL simply tacked on some not-so-new technology licensed from 3rd parties and called it Poser 5. If this is the case, DAZ may be able to license these technologies (dynamic hair, cloth, etc.) from their parent companies and make it all compatible. Of course, DAZ may not want to do this since, IMO, P5's add-ons can be a major pain. They may have a better way some time in the future.