Following on from the above, can anyone tell me if its possible to put an ECU from another Focus of the same year onto mine without it requiring programming or anything?

Does it matter if the car it comes from was a manual and mine is an auto?

I would be getting a paired ECU & Transponder (Key Fob) so hopefully that would sort the immobiliser issues. Lastly is the ignition barrel ring (chip reader) required or is that just a generic reader that can read any ford key?