Sorry Marc, I haven't upgraded yet so I haven't run into this problem. I know you know how to import models, so I won't give you redundant advice on how to import stuff into Bryce5,lol. Do you still have your old Bryce5 installed? If so, could you import the models into a default Bryce5 scene(save it) and then open and convert the file into Bryce 5.5? I know this might be an added hassle, especially if you're importing a Daz, or Poser figure, but it's all i could think up off the top of my head. Good luck.