New Member, need help with backup cam and NAv

I am a new member and have two questions:


I tried searching through the forum but couldnt find my answer, so please help.


1.) I have a 2005 with package 6, smartkey and nav...

I want to add backup camera like the newer models, is it posssible? If so what do I need and how is it done??


2.) I want to update my nav software, what is the newest one I can upgrade too? Can I upgrade to the 8.1? any effects?


Please send me your reply...thanks in advance

-Rich