I walked the Camino Vello variant of the Norte last Thursday, although no-one but the British Confraternity Guide to the Norte Part 2 calls it that (p 52-3).
It starts at the far end of Boimorto, and the locals have kindly made home made signs. The albergue in Boimorto also gives out photocopied maps. It's very easy, all on tarmac, and quiet, if a bit boring. You need to take food and water for the whole day, there is one bar but was closed when I passed. I would highly recommend it at high season if you want to avoid Arzua and stay off the
Camino Frances as long as possible. It's about 25 km from Boimorto to Pedrouzo, but add another 1 or 2 as the albergue in Boimorto is well before the village centre and Boimorto is a long village.
Route description could not be easier: leaving Boimorto on the Norte, bear right at the health centre (instead of left for the normal route via Arzua). Go straight for a really long way! Football Stadium on your right, ages later a chapel on your left. Keep going straight straight straight until you think you are going mad. After about 10km(!) look out for an absolutely distinctive
white cylindrical concrete pigeon tower with a pointy conical roof in a garden on your right. When you see it, turn next left and then 200m later turn right (signpost Oines). Keep straight again for ages and ages. Cross the ugly workings of a new motorway (when road complete will have to detour a little to the right onto a new bridge for this, but it should be obvious). Keep going straight. Cross a slightly busy road with houses (O Xen I think), dive into a gap in the hedge opposite and surprise pilgrims on the
Camino Frances!
Any queries feel free to PM me.