I have a V1, and might be able to help. What exactly are you trying to update?
Is it the full European mapping or just the UK maps?? FWIW I haven't updated my maps in years and I have only come across about 4 roads in the past few years that had changed and made the display go "off route" for a while (e.g. A3 Hindhead tunnel and a main road heading down towards Newquay that had been upgraded).
adam,i will be going to Germany later this year and need the maps to get there,but also to spot speed camera,s .so really to up date everything.thanks.paul.