AUDIO:
The obvious is the pre-amp to amp (950 to 770) cabling -- if you are going to be using all seven channels of the 770 (seven speakers), you'll need seven analog audio cables.

The Denon supports DVD-Audio and SACD, so you'll want a set of (6) analog audio interconnects for that. You'll also want a digital audio cable for the 2900 (either optical or coaxial, it doesn't really matter which).

The RCA satellite receiver probably has a digital audio output, which would be the preferred way to hook it to the 950. You'll need to check to see if it is optical or coaxial. If you're not sure, buy one optical and one coaxial -- whichever doesn't work can be used with the Denon, since it supports both. At least one RCA DirecTV receiver includes both coax and optical digital audio output, but older DirecTV receivers don't have any digital audio output, in which case you'll need a pair of analog audio cables to connect the RCA to the 950.

Analog audio: the "classic" interconnect, RCA plugs on the ends. An example from Outlaw's product line is the PCA.
Coaxial digital audio: looks just like a single analog audio cable (one RCA at each end), but rated to handle digital audio signals. Outlaw's PSC can be used as a coaxial digital audio cable.
Optical digital audio: A cable like Outlaw's PDO (which at $20 for a very well made 1.8-meter cable is probably the best optical cable buy I've seen).

VIDEO:
You will want to use the Denon's component video output. The RCA may also have a component video output, in which case you could get two component cables to go from Denon and RCA to Outlaw plus a third component cable from Outlaw to Toshiba. That way, the 950's video switching would allow you to not have to think about what input to set the TV to. Add an s-video cable from the 950's monitor output to the Toshiba if you want to be able to use the 950's onscreen display to set it up. If the RCA does not have component video outputs, you will want to use the S-video output from the RCA. In that case, I would connect the Denon's component video directly to the Toshiba (the only component video cable you'd need), connect the RCA's s-video output to the 950, and connect the 950's monitor s-video output to the Toshiba.

Component video: three separate video cables (either bundled together or completely separate) that combine to provide a single video signal. Outlaw sells three-packs of PSC cables for this application.
S-video: Something like Outlaw's PSSV.

SPEAKERS:
The BP2000's are your subwoofer, I assume. In that case, I'd probably connect all of the speakers normally and use a splitter to route the 950's subwoofer output to both BP2000's built-in amps.

If any (or a lot) of this doesn't make much sense, this link may help some -- it's a visual aid for what the different plugs and cables look like.

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gonk -- Saloon Links | Pre/Pro Comparison Chart | 950 Review