Poser will automatically generate the rsr that sits in the geometries folder. Actually, with many of P4's crashes, you tend to need to delete this and allow it to regenerate anew. You need to nothing to create it but load up the cr2 that calls for that object. They can be deleted without causing any problems. (It will just take longer for poser to load that obj next time until it recreates it.) The thumb rsr's will auto-generate when you add something to your library through poser. Or, there are some nice tutorials around regarding making nicer ones. These are only important if you want to see what you have :D lol