Hi,
I rendered a texture for you to play around with normal-mapping shaders with and without specularity. You can add the spec-map into the alpha channel if you need it.
If you need parallax- or relief-mapping then you can even use the height map.
Download:
http://www.dexsoft-games.com/freebies/textures/freecrate.zipPreview:
This is a gift for you. Use it but please put a finished version of this shader into the WIKI as an alternative to the 2.0 shader from Matt (please do not remove this one).
Best regards,
Frank