Better guide you can find here: http://youtu.be/SVKiRfTMUWk
I can confirm its not an easy job as almost everything is glued and I also had to break the old screen. I could not do it properly, so I glued new screen on the pieces of the old one. Anyway, it fits not perfectly as it was before, but works :) good luck. PS I bought new screen on Alibaba, it took ca. 2 weeks with China Post