Aww man. Now I'm trying to remember whats the name of the copyright law that discribes this situation.
It basically states the term of public domain stuff and what not.
So I *think* if it's older than 50 years then it's public domain. If not you need express written permission and mechanical licenses from the copyright holder and/or it's owner(s) if you intend on releasing this to the public.
In that case, you would need a mechanical license to print your CDs at a plant. I think it goes for something like 75dollars a "unit",but I might be waaaaaaaaaaaay off.
But like I said, look up the laws on copyright, Im not too sure.