i've got 4 questions about the Garmin Nuvi 1200T...

(1) is it identical to the Garmin Nuvi 1200, but just comes with the additional traffic receiver accesory? or is there something different internally also?
(2) are there many unlocked & downloadable city xplorer maps available? i specifically need munich pedestrian routes but could only see paris and rome on this forum.
(3) is this device "GMA-aware"? what would that prevent me from doing?
(4) can this device support lane-assist? it doesnt have it by default but can it somehow be enabled in the software?

thanks.