In my case I have to disagree with going in from behind the drivers seat. Once I elevated the front of the seat, and then moved it all the way forward I had tons of room to work. The wires in front of the ROM move out of the way as the seat goes forward, and even the plastic fascia on the front of the drivers seat posed no issues. The longest part of the disc swap process was the time it took to move the seat.it is worth it for the firmware update alone, but also for the update in roads/locations etc. purchase directly from navigation.com / navteq and it's pretty simple. as umbertob said it's easiest to go in from behind the rom instead of the front.
This thread is helpful, thanks, and why I joined the forum this morning. We bought a 2008 RR Sport HSE and two primary annoying nav issues, which I've seen discussed. First is having to press "I Agree" every time you start, and then the disable of nav while driving. Bummer that is appears neither has a workaround, thanks goodness for smartphones. Thanks for all the info on the nav upgrade, will be doing that shortly.