Lol, its an extra phone I have laying around. I tried to go big at first by simply replacing folders except for the UMTS and the GPRS folders and editing the blackberyy.alx file. No go. So then I tried replacing files inside of the java folders no go! Then I only tried to replace the zen theme to the new 4.2.2.122 one, nothing lol.

In 4.1 you could do this easily with software between the 8703, 8700 and 8707. But going from 4.2.1 to 4.2.2 must be to big of a change. It was fun to experiment, back on the shelf it goes.