Opt #1 If tv(s) have composite in video, just use an old VCR and its tuner for NTSC and use HD tv to switch video source
Nueatit that is brilliant! Somebody (if not me) has an old VCR kicking around and we can use that unit's tuner just as you said. The LCD TV in question does have composite A/V inputs.
Digital tuner box was an option I was aware of but people in question don't want to spend money buying/renting one, plus rogers cable provider recently changed ("upgraded") the guide interface on the nextbox turner they have in another room & tv in their house and they hate it; the display font for channels, volume, guide, etc is tiny and these people can't even see it. They HATE it. I think this VCR tuner solution will work just fine. its another remote in the mix, but I'll figure out a smooth approach for them. Thanks.