video in

Hi, I'm quite new to this. I am going to buy a v3 box and cam off of mr boz but i'm very apprehensive about fitting it. Is there anyone in the south of the UK (near Suffolk) who would like to earn some cash and install for me (with my assistance) Any help would be appreciated!!! ;)

As promised here is a video of my AV set up. Sorry about the poor video quality, I filmed it with my girlfriends Android phone ;) ... it does not do the picture quality that appears on the Navi screen justice! The video switch in the armrest is one of these which i got off ebay for about £10...