Excellent write up. I bought the upgrade but shipping was delayed and I'm impatient. Just follow the directions as they are outlined and you'll be just fine. No hiccups, no issues, no problem. What a difference the new OS makes. Still the same annoyances (mostly that videos don't automatically restart where they left off when I restart the car, I have to select the video again) but the GUI seems much more polished.
Major thanks to ShortFuse and the board!