How to change Lobby Songs And Songs? Help Pls

Hey RageZone Community,

I'm kinda nooby at this but I experiment and so waht not, alright so basically what Im asking is that what do I need to in order to change the lobby songs and the general songs itself?

Also in the other hand, what files do I need for a new DJ system, I;m trying to do all this is American Audition, I got New Interface working with some tiny bugs with it but hey its unofficial so aint perfect all the time.

If anyone can help me or link me if there is a similar question to this thanks^^