browse to PIP feature (while in browse, the user can bring up a PIP window for the channel browse is focused on)

How can we do this? Does it change the PIP channel to the one you select in browse mode a certain way so that you can browse other channels without having to change the channel that your on now in case you still want to rewind it or does it go to the channel that you select in browse mode to the other tuner by itself if you have the PIP up?