Ok, A while back when the factory 6 stacker s**t itself I googled for a how-to, and found one that showed how to wire up a RCA to go from the headunit and splice into the second plug to wire up it all into the factory loom.

Be f**k if I can find this again.. Any leads or can someone tell me how?

Also, what else can the Sat Nav screen be used for? The system seems to have died since I installed the new carpet and seats, not that a 17 year old system was very useful, but just curious, is it pretty much a useless screen in my dash now or can I make it do something else?