Bad news, you might be screwed. Something simmilar happed to me durring the update. I didn't kill the power but i got an error about 45 min into the installation and it screwed the radio. It's been broken for a month and my dealer is still working on it. After 5 trips into the dealer they finally got ford to condem the part but new units are on back order (with no eta) so they finally pulled the unit and sent it in to a specialist.
Your dealer is going to have to look at it. Hopefully your case is better than mine.