I have tried this most of the day. I downloaded the install file, removed the vendor file, removed my media card, installed the new OS, formatted my media card, reinstalled back onto the media card, BUT...my 8800 wants to keep rebooting by on its own. I finally reinstalled the AT&T v4.2 and no problems.
Don't know what else I can do to get this to work. The little I got to "play" with the OS I REALLY LIKE IT. The layout of the email is do much better and the other features are really nice.
If anyone can help PLEASE let me know. THANK YOU.