Right... Poser may work, but these plugins are for mesh import/export. You could run into trouble importing/exporting meshes... Must be an install problem. Strange, but I bought an upgrade from 3 to 4.03 and was delivered a full Poser 4.03 which installs itself without reference to the old Poser 3. You probably have the same. I'd recommend re-installing Poser 4.03 fresh, not in the Poser 3 folder, as Poser4 should be stand-alone. H:)