Vue d'Esprit has poser compatibility because Eon worked with Curious Labs to create it. Note that their import filter checks for the serial number of your Poser application and checks against an internal record whether it's valid or not. If not, it doesn't work. So, they didn't create that puppy on their own, they licensed it from Curious Labs. If you check a later thread, you'll find a quite short and upleasant comment from someone at Curious Labs having a bad hair day telling a Vue user that "they're on their own" in regards to Poser 5 imports. So it appears even more so, that this sort of filter is highly dependant on co-operation from Curious Labs. Vue 4 imports Poser 4 stuff. Vue 4 cannot import Poser 5 stuff, nor can Mover. Want to guess why?