[Tutorial] Custom multiplayer main menu background

didnt master release some program about extracting music?...

- here is the main menu music file I found with the help of Black Ops Sound File Tool half an hour ago. Unfortunately (or fortunately, I'll explain why later), replacing that file with custom one cause the game not to play it. I guess it should be the same size and have the same header as the original one, I can't implement this. Maybe someone has enough experience to do it, at least I found the right file.
As for my tip that this can be useful: note, that there is no error running the game with modified sound file (remember, that doing the same with incorrect image file will cause an error). That means we can replace all the annoying environmental wind, cicadas etc. sounds with empty one, and it will works! I dunno if you also find it useful, but all theese sounds disturbs me from game, so I'll try it.