Thanks Phil. PTGUI allows you to export the images a HDR is made of seperately, without any blending applied. You can simply load these into Photomatix. If you want to use detail enhancement you have to be sure the images do not have the black bits (the parts at the edge of the frame that are not covered by all the images). If you do have these parts, it will confuse the detail enhancement algortithm.
Amazing capture. Simply amazing. Lovey the colours, the mist and the composition.
As for your comment on using PTGUI, how do you align photos then import them into photomatix?