The easiest way (check my Jolly Roger iPod Mod) is to go to your local music shop and pick up a thin and a medium guitar pick, while holding the ipod facing you, apply light pressure in the center of the back then it will create a gap on the side with just enough room to stick the thin pick in. Then you slide the med. pick in behind the thin one and start sliding it towards the bottom and it should pop out. Be careful with 2nd gen. as the top is around the sound jack and can easily break it, you have to work the back from the bottom and lift it up over the jack and on 3rd gen the jacks are in the back itself but there is a ribbon from the mainboard to the back that can easily be broke. Well hope this help all of you B)