Thanks David,
I have registered at myGarmin and this is the version :- City Navigator Europe NT v9 Deluxe Unlock which was preloaded and it was unlocked by me in March last year. The only disc with the unit was the owners manual. As I was writing this I thought I'd give garmin support a ring and they tell me that Mapsource does not comunicate with the Nuvi 660 directly.But if I had Mapsource I could map out my route on a pc, break the route down into way points and then transfer the way ponts to my favourites. And luckily as they have just updated the mapsource software they have some old disks so they are sending me one out in the post.
