The cr2 has nothing to do with the UV mapping. All mapping is in the .OBJ file. On the PC version, Poser creates a binary version of the OBJ file for faster reading. This would be the large .RSR that you find with the OBJ file in the Geometries directories. To remap the OBJ and have the results appear you must first delete the large .RSR It also contains the mapping from the OBJ file it was created from. The .CR2 contains all of the Joint Parameters, Morph target deltas and coloring settings.