wut connections would i have to go through to have a deck for audio (right now i have the sony cdx-8815) and add a video deck so i can view movies and play ps2 but use the same sound system?
yes, run the audio part of the a/v cables to the aux input on the audio deck, and run the video part of the a/v cable to your screen. You'll have to switch to "aux-in" on the CD deck to make it work though