I found a method that worked for me in opening the case. I started at the top, and used a sewing needle. I'm sure a straight pin world work also. Using some padding between the back of the needle and my hand, I worked the point of the needle between the casing and the metal back. Don't push straight into the gap, push on the edge of the gap down toward the back of the iPod. Once you feel the needle slip in, use it as a guide to get your prying tool in there.
成功完成iPod Touch 1st Generation Display Replacement。