On the issue of Poser dynamics; Dyanmic cloth is actual mesh deformation, I believe it is based on the Stitch plug in. The dynamic hair is a particle-based effect (in part, at least), can't think of the pre-existing plugin that it is based on, but this is known, used technology. Purloinus; Vue 4 Professional is not an upgrade. It has been clearly stated that it is a departure from the Vue d'Esprit line. Vue d'Esprit will have a Vue 5 release, as well as continued upgradespatches to Vue 4. Vue Pro will have its own feature set, and will no doubt grow to where the differences are rather profound. In that respect, E-on is only following the herd. Max and GMax. Maya and Mayalite. Cinema 4D-X and LX. And as with most companies that have such product divergence, they offered a reduced 'sidegrade' price to those owning the latest version of their main product. For a quick cash flow, no doubt. But also as a reward to those who chose them. There is a great deal of expertise around here, you know. Maybe if you asked, there might be answers to be found to your problems. Oh, and if you need Poser 4 to authorize import into Vue 4, you either (a) haven't installed the 4.2 update, which allows P5 to be authorized (the plugin actually has 2 core code sets, one for P4 one for P5. And you can change which executable is used by simply renaming the in use .exe's folder to something else and start Vue and do an import, so that Vue will ask you which Poser.exe you want to use) or (b) have had an accident with the update, and it failed for some reason. I've used both code tracks, and they work, at least on my machine.