Hi Crawa,
I have a 05 Ti aswell with the eurovox gps. I tried at nissan but the manufacturer no longer exists for these units (double check yourself with nissan) Under copyright laws, nobody else can take the maps on.
Basically you are stuck with it. What makes these ones worse is you cant even navigate across states.
My one has stopped working, the hard drive inside it just clicks now, at least I get the nissan badge on the screen
bcl74