Hi

All you have to do is to put the "cbr files " in a folder of your choice (typically in C:\Documents and Settings\Wingnut\My Documents\Eovia (or maybe Daz ?) \Carrara 5\My Presets\My Shaders.
You can also open Carrara, unfold the browser, to search the "Shaders" tab and see what's here. You'll see that there is a folder named "My Shaders", or any customised one
Just drag the new one into the folder. (for real - not from Carrara, unless the shader is already loaded which should'not be possible the first time - imho))
Then, in the browser, search again , and click on "update folder"..you'll see an icon of your shader
Then you'll be able to use it and drag it directly on your objects