You have to convert the Bump map files to Bums or poser cant read them. Bump map files are shipped as normal jpegs because they are so large as BUMs. Delete the RSR again. Load the Dragon. Once you've done that but before you choose a mat file in the Poses open up the Material editor and under the bump map portion click load. One at a time select a jpg file with B at the end. Poser will convert it to a bump map. You have to do all of them (about 10 or so)otherwise you will get the error again. Once your done close the dragon. Load it again. Click the MAT Pose file and everything should work. Hope that helps.