old screen just pops off. i took a small screw driver and pried mine off. new screen should have a peel off paper that reveals adhesive. peel, align and press into place the new one. if you need to replace the keypad on the slide do that first. it is a pain to replace. i had to lift my recently replaced screen several times to get the keypad correct.
leonardo-d-einstein.blogspot.com, June 2009