You
can open Kodak Photo CD (PCD) files, including high-resolution files
from Pro Photo CD discs. You cannot save files in PCD format from
Photoshop.
Note: You can find the PhotoCD plug-in on the Photoshop
CS3 DVD (Goodies/Optional Plug-Ins/Kodak PhotoCD. The ReadMe included
in the DVD mentions where to copy the PhotoCD plug-ins and the color
profiles.