Uh Oh! Sorry for false alarm - I plead insanity as well - or at least tiredness from working all day on the Windows7 thing! When I went into the setup wizard it only gave one option to connect which I presumed at the time was what windows7 had nicely chosen for me.
When I went back to check today I found the checkbox at the bottom that said 'show all options' - and there was the broadband option of course.
Moral of this story, apart from the embarrassment - is 'read all the stuff' properly before going off on tangent! Cheers, Zante.