I'll have to do more testing, but I do know that all the Poser 5 (and Poser 4/PPP) stuff I've loaded into Poser 6 so far works okay. As far as the other direction (Poser 6 stuff working in Poser 5)? I think it should work in most cases, as long as the P6 stuff doesn't use any P6-specific features or the newer P6-style .obz files and such. /P