By the way. After having trouble with it yesterday, I got it working this morning no problems. Now I'm enjoying my taste of ice cream sandwich greatness!!
My phone
had never been rooted before, and it failed when I tried to install via the recovery with the zip. Then it soft bricked.
It was only when I used the Utility1.7 and followed the direction in the video did it work flawlessly.
SO HERE IS MY SUGGESTION IF YOU WANT IT TO WORK PERFECTLY THE FIRST TIME!!
1 use Matt's Utility FIRST, as if you are unbricking your phone! (This prepares your phone for the update!) Utility download is found on the OP
2. Then follow the instructions on the OP, or with this video link below.
Droid Razr Utility 1.7 [For Ics And Those Who Want To Go To Ics] - DroidRzr.com - VIDEO
The video even gives an option and shows you how to root at the end. I did because I wanted to use Apex Launcher instead of the default.