Right, I've had my is200 now for two months and have been reading thread after thread about getting the standard sat nav to work with a aftermarket headunit, I have the amp by pass lead fitted to un the aftermarket headunit, I have the standard headunit which was working but was rubbish, so I have seen in a thread about using the main board from it, so I was wondering does anyone know or have a walk through of how to do it please because I would love the sat nav to work, or if I can't I will take the sat nav out and run a different screen, lol, cheers a lot oggy