Interesting, Digital Guru. So during the process of assembling files, such as audio files for a music mix, you actually duplicate the original files to a new directory you call a project folder. The full pathname for these files will be different in a new version of Windows, since the base directory names change, but you think Roxio will still look in the project folderfor the audio files when recreating the mix. If so, that would make it worthwhile to use the disc space for multiple copies of the same audio file in different project folders.
Disc image is what Creator 10 calls an image file of a music mix made for burning to disc.