I suggest asking for advice from the Software Freedom Law Center: http://www.softwarefreedom.org/ http://www.softwarefreedom.org/ They specialize in this kin

I suggest asking for advice from the Software Freedom Law Center: http://www.softwarefreedom.org/ http://www.softwarefreedom.org/ They specialize in this kind of thing. As a point of ... trivia? ... Eben Moglen, the attorney that created the GPL along with Richard Stallman, directs and is a founder of SFLC.