I have Vue 4.12 and Poser 4 and 5. If I save a .pz3 or .pzz from Poser 5, so long as it doesn't use P5 specific stuff (P5 people, hair or dynamic clothing) those Poser 5 .pz3's and .pzz's can be imported into Vue. If you use a P5 material that wont get imported either, but then you can just apply a new material in Vue then anyway. You could always copy the P5 people to your Poser 4 install if you want to use those figures.