I've paid for the latest maps on my 660. The program has updated the sumo but how do I update map source. Surely if I plan a route it should be on the same software as the zumo
I am assuming you are talking about the puter if so they should have both updated at the same time. On puter check the utilities and manage map and it should show 2012.1, this should be the same as the maps on your unit.
When you are downloading the maps there is a page in the process where an Advanced options box can be ticked. Tick this and choose to have the maps installed on your computer, and available to Mapsource, as well as updating the Zumo.