Go to your libraries browser (default location is the right side of the screen). Select the libraries one at a time. At the top of each library is a folder. Double click to open. You should then see a list of runtimes. Click the plus (+) sign at the bottom right of the bar. Locate your Poser 4 runtime and add it. Then open all your files in Poser 5 and re-save them. Then open in Vue and most of your troubles should be solved. I believe the head issue is because you need to create a new character file with the new head. Then open the new character and pose and then import to Vue. Hope this helps.