So I'm trying to import a .PAT pattern file I downloaded from Adobe.com into Illustrator CS3 and can't find information on how to make it work. I've tried copying the PAT file into the Pattern directory in the Program Files and I can see the new option in the Swatch Libraries Menu > Patterns, but it is listed with the file extension and doesn't work when I select it, saying that it is an unknown format.

So how do you get a .PAT file into Illustrator and actually use it?