Is it possible to disable the trunking channels (make them completely dissappear) by use of software in this radio and leave only the conventional channels visible / operational?
Situation:
Drivers (school bus) are being confused by the trunking channel which I lobotomized (TX set to the repeater's output) and named "UNUSED". There is a language barrier ("ESL") which makes things worse.
The radios were purchased by the company's owner without my input or realization that this might be an issue, so he's stuck with them.
I've even thought of labelling the trunking alias, "PUSH +", to prompt the driver to change the channel to the correct one, but again ESL will be the downfall of this idea as well.
Add to this, occasionally the radio will come up on the trunking channel, on power-up, and the driver's world immediately comes to an end.

TIA
Stan