you know how AIM has a file transfer feature? you can send music to the person you're talking to on AIM. limewire is A LOT like that, only it's on a huge server and you're downloading from random people. and by the copyright warning, they mean you can get in trouble if you swap things that are illegal no matter what, I.E. game emulators, whole copyrighted movies, THAT KIND OF THING. music should be fine.