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.
Download:
http://www.dexsoft-games.com/freebies/textures/freecrate.zipPreview:

This is a gift for you. Use it!

Maybe it is a good idea to put the finished version of the JCL-shader into the WIKI as an alternative to the 2.0 shader from Matt.
Best regards,
Frank