I have a VCR/DVD recorder combo unit from Magnavox, but I can't record programs while watching them on my digital HDTV set because, according to the Magnavox owner's manual, the combo unit does not have a built-in digital tuner. I have a large-size Comcast cable converter box that receives over 75 cable channels and I hope it would solve my recording problems. It hasn't. So I'm talking with my friend Eileen about buying or renting a DVR, and with it, maybe I can record from my TV to the DVR and then I can download it to my VCR/DVD recorder. Otherwise, I need to buy an external digital tuner.