Orient vertex

[Nova]

I'm trying to orient vertices parallel to an edge, as outlined here: http://http.developer.nvidia.com/GPUGems..._ch07.html

I'm not using as simple a setup as in that article though (See attachment), so the vertex normals look in different directions. I've tried turning the edges, and applying smooth groups, but neither really yields the result I'd hope for.

Does anyone know if it's possible to manually orient the normal of a vertex to a selection (Such as an edge)?

Cheers,
Nova