Required Reading for ISO 9660 Image Editing:

1. ECMA 119 / ISO 9660:1988
2. El Torito CD-ROM Boot Specification
3. IEEE P1281: System Use Sharing Protocol
4. IEEE P1282: Rock Ridge Interchange Protocol
5. Microsoft's Joliet Specification
6. ISO / IEC 9660:1999

Or, download 'em all in a tasty chewable