I honestly think music shouldn't be your biggest worry out of all the things that might get you in trouble for this mod! I bet the CIA's reading this right now!

On a side note, I actually was under the impression that peer-to-peer file-sharing was controversially but cleanly ruled to be legal. The case also resolved that people who talk on forums count as peers, so that means us. On the other hand, the ruling may have just been in California, so I don't know. Fortunately, I can mod myself, so I can just add whatever music I want.
Also fortunately, I guarantee you that all the obnoxious media companies who currently hold copyright claims will soon be rendered as dead as kerosene by the Internet. I think that instead of sueing sites like Youtube for money, they should just make a court case to get
stock in Internet companies. Because that's the only way they'll survive in the long run; trust me.
Now, I wanted to ask you a few other things about the mod. One, you said each Civ could have several different leaders. However, I didn't think that was actually possible in a scenario, so how would you make that work?
Secondly, you also said that while you could play as several leaders, you would be forced to have the same ideaology. This is not necessarily true, as in BtS, some leaders have Favorite Civics as well as favorite civics.
Also, what are the punk unit's stats going to be? And will your armed worker/armed guy in business suit be in the game?