On Tuesday 04 December 2001 08:44, Phil Mendelsohn wrote: > I believe that photo discs aren't ISO-9660, but a variant -- or > deviant! -- thereof. The discussion has rattled something in my brain from when I taught a multimedia class and one of the things we discussed where the basic "Book" formats for CDs. (Red, Yellow, Green, Orange) Photo-CDs were the impetus for the Orange Book standard, which defines the physical way in which multi-session discs are created. I don't believe it has any bearing on file format. That said I suspect that Kodak uses its own format to maximize capacity for Photo-CDs. I got my self a refresher at: http://www.gi.alaska.edu/crc/cdrom/cdrom.html So people with and interest may wish to look there. -- Jack Ungerleider jack at jacku.com