I think you misunderstood the whole thing. If you wan't to update your Media Nav with newer (FREE) iGO maps, the first thing you need to do is unlock/hack the system itself. That is not something that you can do for yourself, so rather than try to brick your Media Nav I suggest that you buy unlock menu Menavrus. It costs 30 euros, check another thread. You'll get all the instructions that you need. Another options is official map update via Renault Media Nav Toolbox.