Ok, so a few weeks ago while I was cleaning the back of my phone, I noticed a 1.5 inch crack starting from the middle of the dock connector. My iphone is 6 months out of warrenty, and I think that I can replace it myself. Now I have 2 questions: 1: Where can I buy a new black 8gb back case? 2: Where can I find a concise guide for replacing the back case? Thanks!