I beleive the Zenith 2200 is a clone of the LG3200. I can see from specs of the Zenith 2250 that it uses the same remote as the LG3350. Hence as the LG3350/Aiwa Hack works on later LG3200`s I would say try this hack. You can find it within the Hack pages on this site under Aiwa.
Try it and let us Know.
Croc `<