Props could be figures also. CR2 files are Poser figure files...there's probably a good reason the vendor made them figures instead of props. PZ2 files are pose files. All MAT files are PZ2's. Some people do move them to the Camera library after renaming them *.cm2 and they still work. I don't know that you can do what you did, renaming them as props and putting them in the Prop library. Never heard of that being done before, although I don't know what caused your freeze-up.