Glenn,
If you want to ad sound to the Photo CD disc, you will have to wait until we
introduce the Photo CD Portfolio authoring software this summer.
If you want to combine sound on a hard drive with playback of a Photo CD disc,
that is another matter.
You might visit the Kodak forum (GO: KODAK) and the Photoforum (GO: PHOTOF) and
ask your question of the technical people there.
Regards … Paul