Okay, if you look at this map, then look at all the three Neon Green dots, those places I have marked, are places that have rocks, or Meteors, and they can activate, a really awesome song. The first one, is close to the window, near the downstairs, door, it's in a glass container, hold X, and you should hear a noise, or your Character should say something. then the second rock, is in the Dressing, room, you need to find this one right behind a bunch of dummies, then it should be on a wooden pole, the hold X, and pick it up. The Final rock, is in the Back, Room, it is right on the shelf near the Barricade, then hold X, and your Character would say something, and then a song will come on, and that is how you get the song, 155. Hope this helps you in your zombie time.
-DC-