Sorry i am new to this type of stuff. I have got Avic F840BT i have managed to update the maps to 2013 version from posts i have found on here, and i have also found a test key that works to get to the test screen on my AVIC. Is there a tutorial that explains how to remove the nag screen on my version. There doesn't appear to be much info at all available for this version. I am a bit confused on were to go next. Do i take a back up of my current firmware and modify that or do i install a total new firmware. There is also a new firware availabe for my Nav from the pioneer website. Please advice me on my step.

Thank you in advance.

PS. i don't class myself as a total numbs skull with PC etc.