Tomtom Go520 update maps for USA

Hi All

Appologies I only tend to do this every other year for when we go abroad and each time I can never find the details. I was a member on another forum which seems to have dried up abit but notice that "biggerdave" had helped me in the past and is a active member on here so hopefully I can get the answers I need from this forum.

I have the above tomtom which needs to be updated with new maps ready for our new trip.

I got hold of fast activate as I seem to remember I need that to activate the maps but not sure what the latest navcore should be on this device and also a location for the latest maps.

If anyone is able to advise id appreciate it.

thanks

Colin