Closer shot of Onkyo 602
Well I read from other sources that game systems use a surround sound type thing even though they only have red and white cables. and I'm not concerned with the PS2 as a DVD player because I don't play DVDs in it.
back of a gamecube
Havne't found a back of a ps2 but I'm not as concerned after reading from other places. I am pretty sure on how to hook those up, but after all this talk of digital audio out from dvd players and such I'm not sure of that.
EDIT:
Here is a site that answers my GCN and PS2 questions. So lets move onto DVD and where exactly the cable should go.