Just an added thought. Channel databases are shareable - especially if you own both receivers. I have been drinking --- coffee --- with some programmers / equipment builders and ---- WOW!
I DO NOT KNOW or want to know how, but if such a feature could be added, I would suggest not trying to use the scanning receiver for regular viewing. I think ... I KNOW NOTHING .... the software / firmware could be written and installed in existing hardware, but to add it to other features could cause a whole pile of headaches.
Warning: Potential brain overload: 3 or more firmware codes on a USB thumb drive; 3 or more User databases / channel lists on said drive. Update by USB; ??? While you are at it, listen to the radio and have a slide show of you favorite dishes, family or vacation pictures on the screen (beach webcam?).