PPP because that is the main Runtime I use. I never actually fire it up as it is OS9 Poser 6 because it is the most stable. Poser 7 as I am anxious to use it but even with SR1 am having some major deal breaker problems so I have been forced to fall back into using Poser 6. More about that problem in a new thread. Why? As above, I never take off the previous version until I am sure that the new version will fit into the pipeline without stuffing it up. Sad to say Poser 7, while having great features, is stuffing up my pipeline.