make a flash movie with the mp3 in a mc, set it to stream, then export it as a swf. In your main movie make a play and stop button on your play button put a code to load the mp3 swf into a level, your stop buttonwill have stop all sounds action as for the volume slider thingy i havent tried that out so im not sure if it will work but this is one way of doing it try doing a search im sure you will find some topics relating to this good luck