You should have just used the music... you weren't selling it... yout use would have been too small for them to care except for sending a "Cease and Desist" letter, which would, chances are, never happen.
Now if you were making 10,000 units and planning on selling them for 14.99 each at your daughter's game, I would be more concerned...
I know what you mean, but as a professional photographer who relies on my copyright to protect my financial interests, I felt it would have been hypocritcal for me to just "use it."
It drives me nuts to see some high school kid using my sports photos on his "myspace" without even asking permission.
I know its small potatoes to these guys, but there are a ton of honest people who want to do the right thing--if only they could tell us how.