Wireless R.F. Modulator??

I would like to know if the signal from a $20 r.f. modulator can be amplified so that it will broadcast without connecting a cable. I have a collection of small TV's and enjoy watching old B/W movies on them. I want to be able to go to any room in the house, plug in my little TV, extend the antenna, and receive the movie on my DVD through the TV (ch.3 or 4). I have a Gemini Rabbit system that works fine, but I want to eliminate the receiver. Anyone know if this can be done?