Homemade low power TV transmitter?

[RetroHacker]

The end of broadcast TV is nearing, and come 2009, all of our sets will be forever stuck on channel 3, with some digital converter box. I am curious how hard it would be to build a low power, "housewide" TV transmitter. I don't know what the FCC rules on transmitting television are/will be, but is it possible or legal to build or buy some sort of small transmitter so that you could broadcast to all your old sets?

Imagine, a transmitter for each of five channels, broadcasting tapes (or re-broadcasting your favorite channels) on the standard analog TV band, so that all the sets in your house could use their own tuners! It's ambitious, to say the least. Having no knowledege of television transmission, I figured I'd post and ask the experts what they think.

Or, avoiding over the air broadcast, if you had some sort of modulator that could produce a signal on TV channels (more than just the normal 3 and 4) at suitable power to be cabled directly to all your sets, you could create your own, in-home cable network. That might be a better idea. No worries about broadcast license/rules, and everything nice and self contained.

Seeming as though I only watch a couple of cable chanels, it would be great if I could "remodulate" them, and send them out to a run of cable to all my sets, and have 12 channels that are all things I want to watch, or close to it. (Sci-fi, TV-Land, Discovery, etc).

Any ideas?

-Ian