I have been playing around with the tutorial created by Esper from DD instructions, you can find it
here.
So what I basically tried is this,
I created the bump map layer with the feathered text on it.
Then created a new layer which contained a texture, in this case a copper metal effect, then made sure this layer was selected.
I used the filter>Light and shadow>Lighting effects and set the bump map tab to the bump map image already created. I then adjusted the light settings so I have one directional white light coming from the top left and a red point light coming from the middle right of image.
Finally used the original text layer to create a layer mask for the textured layer.

Just tried another with amarble texture and a more intense blue light

I am pleased with the results and with the ability to adjust the light settings it does give a lot of freedom in the design.