I have Windows XP, so I'm not sure if you have this and it will work for your power point too...but all you do is click INSERT then MOVIES AND SOUNDS then SOUND FROM FILE or PLAY CD AUDIO TRACK. Then you can select the sound file you want and a window will pop up and ask if you want it to play automatically in the slide show. If not, it will replay every time you change slides. If you choose PLAY CD AUDIO TRACK, a window will show up with MOVIE AND SOUND OPTIONS, where you can select which track, how long to play it for, loop, etc.
Good Luck dude!
P.S. Just because I take computer classes on Saturdays doesn't mean I'm a geek
