When it comes to the
Camino de Santiago, the FFR is not necessarily the right source (except for the 4 major routes) if you want to follow
Caminos. In France, they are left to be created and taken care of by regional associations (except, again, for the 4 major routes)
The one for your stretch is the Rhone-Alpes association of the Camino. Imo, "their" Caminos are pretty well marked and easy to follow.
->
their website in French only (imo, not really easy to use and not too many info)
Here's a map of the Caminos in their region (can find it and zoom in on the website)
Here's
the itinerary from Lyon. Also useful, a more detailed map of the itinerary through Lyon
here.
You can buy the exact booklet for this route (red one!)
on this page, that includes maps, charts (with distances, villages and their accommodations and available services), lists of addresses/phones/detailed accommodations and services/touristic information for each village. If you want to buy it, it's
here and they only send it by mail.
On the same page, there are also recent itinerary changes (watch for "modification itinéraire") and downloadable GPS files (below the booklet's picture)
That said, like said above, there are various others options...
Buen preps!