Changing head unit

Hi guys,

New to this forum and I just got my Matrix for a few days, really love the car. However, would like to know if there is any tip in changing the head unit. I went to a local car audio shop and they told me that this is the same deck as the Cavalier yet the Cavalier needs this deck for diagnostic testing for tuneup. I am not sure if it is the case for the Matrix cause it is a Toyota car. OTOT, if anyone have any panel removal diagram, would be great cause really need to get the front panel off to do some other work. I know the deck panel is a simple rip out panel but I need to know the entire dash + center console panel layout with screw. If anyone can find the info, please share :)

Check with these guys. If anyone knows, they would.

http://www.mobiletoys.com/