Stuart try Tyre to Travel easy to plot routes.
Tomtom also have a new (Certainly new to me) piece of software
tomtom mydrive. This allows you to enter a start and end point and you can get the system to plot a route for you including hills and thrills.
You can then up send this to your Tomtom. I've been playing about with this an impending trip to Italy. I'd picks a route using Tyre and Google maps and the Tomtom hills and thrills automatic selection was almost identical.
