Hi, I copy the installation of my software to a cd-rom. Then, I create an image of this cd, and burn this image in another cd. So, the 2 cds has the same volume number. I would like to identify each disc solely, because anyone can create an image of the original disk and distribute this cd, or something else. So, I would like to recognize when the software was copied to another cd, like a manufacturer's number, so, if it is a copy of the original cd, it has another manufacturer number.