Thanks to this guide and a RAM upgrade my imac has at least a couple more years left on it. I did not disconnect the front bezel or LCD I just laid them aside (the LCD had to be propped up a little to prevent pulling). The scariest part was removing the HD heat sensor. I just went really slow and most of the glue was still attached to the sensor so that all I had to do was press it against the new HD and it affixed just fine. One week later and everything is working great! Magnetizing the Torx driver with the remote magnet is a great idea. I purchased a stand alone magnetizer/demagnetizer myself though.