Oddly enough, I can't do that now that I have a satellite dish (and my friends with cable are in the same boat.) The VCR will only record what's coming in on Ch. 3, which is whatever I'm watching at the moment. I can't tape ch 2 from the broadcast airwaves because antennas haven't been worth squat in NYC since the towers went down.
Cable also makes those old picture-in-picture sets sort of useless, too.
Soloution: TIVO
TIVO has set us free of commercials and broadcast times. We watch what we want, when we want and no stupid commercials.