Save as PZ3, then use the PZ# to cr2 conversion utility from fun stuff to convert to a cr2. Copy it to your prefered library section and ready to go. Open Poser, it will show the file but no thumbnail. Open the figure, then re-add it to the library with a different name. This will create your rsr. Explore the library where you placed it, change the name of the rsr to the one of your original file and delete the second cr2 with the different name. Your new figure should now show in the library with thumbnail and all.