I finally got the actual Mac that was originally running these files. My plan was to back up the machine, then try messing around with things like upgrading the ccMail version, playing around with applescriptability etc.
BUT so far, the machine will not power on.
This happened the first time when I copied these files off initially. That was the first time this mac had been used in 20 years. At first, it would not power up, but after leaving it plugged in for an hour, it magically started working. Not so lucky this time around. I'm hoping it starts up eventually and I can poke around and see what I can come up with.