AdamDZ and Contango: I've sent you both private messages with links to the GPX files in question. Perhaps you could have a look at them and let me know if anything is amiss.
By the way, I'm planning to ride from Seville to Lisbon following old roads and trails, and a friend of mine who's cycled the route and written a book about it included these tracks (routes?) with it. It would be so nice to be able to have turn-by-turn directions.
Thanks so much.