take the .cbr files and I put them in folders by type and all the folders in a single folder (name as you will), then in Carrara click on Shaders and then click on the far right the little round icon that shows a paper with a folded corner.  Click add folder and navigate to the single folder that contains the others.  Add that and they are color shaders is the type.  I will try to find the video that was done that showed how to re-organize the shaders my marco I think.