That device that AA suggested...well, it actually replaces your DVR function...I would not go that route
The fact is, IMO...DVRs are made for people who don't want to take the time to record to their computers. DVRs are viable for users who don't realize that they can do the same thing on their computers...with more flexibility, more storage...just by using a capture card. Capture cards include scheduling of capture, capture format options, some even include software for editing (commercials, etc.).
But...DVRs are soooo easy, in spite of the fact that users pay a lot more in fees...than they would for the same opportunity they could have using capture cards and a PC.
No need to click through commercials, just cut them right out.
My impression is that DVRs are for persons who just "want to watch TV", while capture cards are for those who want "just the facts, my way"
You may like this link: http://electronics.howstuffworks.com/how-t...-hard-drive.htm