Copy the "screen" folders files to the "Centrafuse\Skins\Aura BW\screens\" folder and copy the skin.xml to overwrite the exsisting file.

OR

You can copy the entire "Aura BW" to a new folder ("Aura BW - Red" for example) and copy the files to the "screens" folder there and overwrite the skin.xml file. That way you can use it as a seperate skin.

Thanks

nintwala