hi i know this is a bmw forum but i own and 2001 rover 75 cdt(well it is the bmw 320d engined car and rover was under bmw ownership) i have a mk 3 navigation computer which ive been told is the same unit in the E46 (ive got the highline satnav system in the car) can i update the software ,ive got a 2001 map which as you know is outdated,can anyone help me to turn it into latest map,with birdseye view ,full postcode etc