I too had troubles opening a few of the files, I even downloaded the latest Adobe Reader and all I kept getting was the evil spinning ball of death only ending with a forced quit of the application. I downloaded them again at work and tried opening them with CS3. Same result, application would lock up. I then opened the file info window, changed the "Open With" to Preview and it opened! I then saved it as a tiff, opened it in CS3 and viola! Got the whole set and I can't wait to find some time to work on these. Looks like a fun project.