Does anyone how how the folders/files are stored on a BB? I have a friend that is on Cingular and I want his ring tone ("cingular ring tune"), but I can't seem transfer it via MMS. I'm not from the U.S., but I would still like to copy that ring tone to my BB? Is there anyway to do that?

nope

You might be able to email it. If not, it needs to be hosted on a web site and downloaded.