If what your saying is putting more then one operating system onto a CD, then I guess it has to be in CLI. I'm not exactly sure how to do this, but I'm going to do some research.
My best guess is to store the Operating Systems onto the CD with Grub. When it boots up, I can see it booting up into grub. Then from there, grub can decide on which boot should the computer boot in. Maybe you can also try adding a C folder, or something. This will act as the C drive to store all your information or something, but not sure how to exactly put it together.
So for the week, I'm going to try to get Bash and DOS on a CD. From what I can tell, your trying something kind of new.