You can't just connect your DVR box to your computer via USB and do it like that. You need to get a video capture card to do it. I use a Hauppauge USB external capture box to do it (
http://www.hauppauge.com/pages/produ..._pvrusb2.html). The entire box can act like a DVR box because you are able to time shift and schedule program recording via that box but I have digital cable and I can't plug my cable into the box straight (it needs to be decoded via my cable company's DVR box first). It's a bit of a pain in the ass because if you want to record something off the DVR box I have to start playing it on the DVR box and capture it on my computer real-time and also I can't change channels on the TV. I usually record it at 12Mbit quality to an MPEG-2 file (about 5~6GB per hour) and then edit out the commercials and then burn it to DVD.