I renamed them R_Animals, etc., and added them to the libraries, but it didn't make the texture files show up.  What should I try next. 

I discovered the jpeg's will only open in Preview, not any other program.  I can open them in Preview, save them as png's then open them in my graphics program and resave as a new jpeg.  That way the material room will see them.  I discovered this late last night and haven't had time this morning to convert all of the textures into a new folder to replace the old ones in Poser to see if they are recognizable.  I'm not sure how to do this with the obj files that won't show up.