Poser 5 is great, but it is DIFFERENT. One thing it does differently is that if you launch Poser 5 by double clicking a .pz3 (or .pzz) file, it will NOT read the document settings, but will launch to the previous window state or to the default state. In order to get P5 to read the document preferences stored in a file made on Poser 4, you must first launch Poser 5 and THEN load your file using the File>Open dialog. It will then properly adjust the workspace to whatever was saved in the file.