Zenith "new horizons" motel TV remote/menu question

[radiotvnut]

My flea market friend picked up a 27" '93 Zenith "new horizons" motel set out of the trash. It has the standard 75 ohm coax input, a theft alarm jack, and RCA inputs. Much to my surprise, the TV actually produces a very watchable picture; but, I can't get it off of channel 3. The menu buttons on the set are locked. I have a Zenith universal remote that will bring up the menu; but, it won't let me autoprogram the channels. When I try to enter the channels via the remote keypad, the TV goes back to channel 3. I tried to access a service menu by pressing 9-8-7-6-enter on the remote; but, that did nothing. I'm guessing this is one of those sets that requires a special remote to program the set. I ran into that with two Magnavox sets once. I had to track down someone at one of the local motels to program the sets for me.

Does anyone know a way I can program this Zenith without spending a bunch of money on a special remote?