HDDVR (HDMI out) -> (HDMI in) Samsung LN40A630 HDTV
digital optical/digital coaxial out) -> (digital optical/digital coaxial in) Onkyo TX SR504 Receiver
SONY DVP-NS325 DVD player (Component video out) -> (Component video in) Samsung LN40A630
(digital optical/digital coaxial out) -> (digital optical/digital coaxial in) Okyo TX SR504
The HDDVR won't do pass through from the DVD output, so you have to connect directly to the receiver for audio, and ideally, directly to the HDTV for video via HDMI or component. You pretty much hit the nail on the head.
I would be grateful for advice for hooking up an HDTV, HDDVR cable box, DVD player, and receiver. The HDTV is a Samsung LN40A630; HDDVR cable box is Scientific Altanta Explorer 8300HD, the DVD player is SONY DVP-NS325, the receiver is Onkyo TX SR504. It seems optimal to connect the DVD player to the HDDVR so that the signal can be sent to the HDTV through the HDMI cable. But, I don't see inputs on the HDDVR for the DVD player, just outputs to a VCR for storage. The receiver does not have an apparent HDMI input or outputs. Any thoughts? Suggestions? Is the solution to send separate signals from the DVD player to the HDTV via a green/blue/red cable and from the HDDVR cable box to the HDTV via an HDMI cable?