I know I am reviving the dead with this thread but I was wondering if you every got the HU out? I am asking because I was at one of the new car dealers we service the other day and my installer had to pop in an amplified stereo antennae. I remembered this thread and sat in for a minute to be sure it was as easy as I remember.
I must say, the directions I posted above were dead-nuts on. It took him under two minutes to have the radio out and on the floorboard. The only part I can think of that you may have had trouble with it was because you have to use some "smart" strength (not "retard" strength as we call it) to pop loose the shifter bezel. But, he just uses a pick and works his way around it popping each clip loose one at a time.
Just wondering!