On the 501, or any other PVR that can record two shows at once AND allow you to watch one recorded show while recording another one) how long do you have to wait before you can begin viewing a show that is being recorded? If you start recording "Friends" at 7:00pm and at the same time record "Survivor" on the other network, can you start watching the recorded section of "Friends" at 7:05?(while still recording "Survivor") In effect, this would be recording two shows while watching a recorded show. This would be almost as good as watching it live.