With 3.1, you'll have better luck importing one figure at a time, but I mean "figure" as one P4Fem with clothing and hair, for instance. Sounds like you have plenty of RAM to export/import using OBJ with no problem. Props could be troublesome if exported with the figure. So if your P4Fem is carrying a sword, for an example, export the sword separately. As Mike mentioned, be sure in Vue that "resize and center" (in Options) is not checked. When you import each figure and prop, they will come in at the correct positions relative to "where" they were in the Poser scene.