Normal to depth mapping

I've just downloaded normal2depth.exe from Fabio Policarpo's Quake4 Relief Mapping to change the normal maps to depth maps.
Once thats done, I'll have to use depth2cone.exe for changing the depth map which I obtain to a cone map, this would then allow me to use use the cone texture map on Fabio's relaxed cone step mapping shader program.
Just a small update, while I'm testing w.bloggar for my future posts.