Can I Play Ps3 Games On 720p On Simple Flat Tv Using Component Av Cable?

I think the AV cables supplied can only produce 480P(DVD quality) picture or at most 576P. 720P means you are entering HD lines. HDMI cables are meant to handle HD signals. Try a HDMI and you will see the difference.
Also, your TV should support HD. I am hoping by ‘Simple Flat TV’ you mean a LCD or a PLASMA TV and not normal CRT’s with a flat screen.
Check for the terms ‘HD ready’ or ‘Full HD’ on your TV or else check for a HDMI slot behind the TV (It’s a single rectangular slot). If you have it, then only can you view HD picture via a PS3.

How Are You Running Av/hdmi Cables Behind Dry Wall From Your Flat Panel Tv To Your Receiver, Dvd Player, Etc?

Do you just create an opening in the dry wall enough to put the cables through and send them through and out from below? I have to run HD av cables from the tv to receiver and an hdmi cable from the tv to the dvd player behind the dry wall.
Or do you install some type of junction box put the the cables through?

How Do I Hook Up The Red White And Yellow Av Cables To My Flat Panel Tv For My Wii?

I have a Samsung Flat Panel TV, and there are two reds a white and a blue and green place for the cables, but the Wii came with red white and yellow cables, Where do I put the cables?