[Ararat]

You'll be able to use the EPG fine, as this comes from the internet, NOT the card. Media Center (atm) doesn't support capturing the EPG over the air (EIT), although the release of an update allowing it to do so is apparently imminent. It is possible to integrate it into media center, and it shouldn't affect your digital tv if you do it properly. But regardless of what you do, the EPG shouldn't be a problem, because it's downloaded.