You may recall my post on this subject. If not, here it is (now closed):
Courses only allows running and hiking types, why not walking?
Anyway, I made an amazing discovery on my FR965 yesterday.
The Walk activity does allow navigation, and it will load a Course.
So while walking can't be selected when creating a course on the web, the Walk activity will load a course. At least it does on my FR965.
I'm very happy with this discovery!
Keep on steppin',
Eric