According to documentation, Illustrator is supposed to able to open .cgm files, but I can't open a ton of images I have on CD. These are from a pretty old version of PrintMaster Gold for Windows, released sometime after Windows '95. I don't use the program, but in the past have often used the artwork for various projects.
Every time I try to open any of these files, Illustrator tells me the file is in an unknown format. I've tried for Mac:
AI CS4
AI CS2
AI CS
For Windows:
AI version 8
None of them will open the files. I can find numerous programs for both Mac and Windows that will view them no problem. Why can't Illustrator open them? A long time ago, I had Illustrator 4 for Windows which opened the exact same files with no problem.
My goal is to open and convert them through an action to a newer format, if I could open the things. There are quite a few fairly inexpensive Windows programs I found that can do it, but I should be able to do this in Illustrator without buying another app.
Here's one image as an example.
http://www.jklstudios.com/misc/SNOWMN01.zip
I compressed it since browsers try to display it as random text.