What is it about P4 that you still want to use? Are there old Python Scripts that won't run on P6? Now that I've been running P6 for a while, I am considering uninstalling P4 with PP completely and just moving the runtime library so as not to have to install all my stuff again. Poser 6 definitely has a better rendering engine. The only thing that is stopping me is that Vue 5 don't like P6 figures or files yet, I've been having import issues, but once that is resolved I may reconsider if I still need the older version.