After many many hours and many emails to Garmin l have at last managed to update my maps on my Zumo 550. It seems that the internal memory of the Zumo is not big enough to hold the lifetime Europe mapping, so it has to be loaded onto an sd card. I cannot tell you how much hassle this has been, but then out of the blue l received an email from a guy at Garmin giving me dirctions on how to do this. Why on earth l was'nt given this info from Garmin months ago l'll never understand. Just hope that this is of use to anyone else trying to update their 550!