Just for the record, here is my final wiring diagram.

Satellite box component out to component in #1 990. Opt out satellite to opt toslink #1 990. Labeled Video #1 Satellite Comp 1 opt 1.

DVD component out to DVD comp in 990. Opt out DVD to digital coax #1 990.
Labeled Video #2 Component DVD opt coax #1.

PS3 component out to Key Digital comp in, back out to comp #2 on 990. Opt toslink out of PS3 to opt toslink #3 990.
Labeled Video #3 PS3 comp 2 opt 3.

Xbox 360 component out to Key Digital comp in, back out to comp #2 on 990, same as PS3. It will automatically sense which one is on and send signal. Opt toslink out of 360 to opt toslink #2 990.
Labeled Video #4 Xbox 360 comp 2 opt 2.

Nintendo Wii component out directly to TV component in #2. Audio is anolog to 990 anolog #1.
Labeled Video #5 anolog audio #1.

CD toslink opt out to opt toslink in #4 on 990.
Labeled CD audio opt #4.

Component out 990 to component in on another Key Digital product, a distribution amp. This has 1 component in and 2 component outs. The outputs will output at the same time. So again, component out 990 to Key Digital component in, then #1 output to TV'component #1 in. The other component out on the Key Digital goes to my component in on my progector.

I think I covered it all. Let me know what you think. I also ran HDMI from satellite box to to HDMI TV so I can just watch TV if I choose.

Thanks.