How can Robert move from component to HDMI? Leo says that component is the last bastion of analog and he'll need a digitizing box to move to the digital signal of HDMI. But that's only half the problem. Robert may have an issue with copy protection as well with HDCP. There could also be sync issues.
If he's recording directly from over the air, then the easiest way would be to use a FireWire device. Leo recommends going to AVS Forums. There's bound to be someone who's doing the same thing Robert is doing, and has cracked it.