Ghostscape: Keep in mind that this tutorial is rather old, and that this were mainly a quick thrown together tutorial to give people some pointers in order for their normalmaps not to look like this
As mentioned in the end of the post, it isn't really perfect, and looked a bit like concrete.. but it was atleast quite an improvement from the image shown above
As for the DX display, it'd be better just using a DX viewport shader like Doylle's or something.. didn't know about that stuff when I wrote it though.
Cheers!