by all means, do what you like with the picture, as long as it is for learning lol Thats pretty much the reason i did this shoot, just to learn hdr. if you want to have a go message me your email adress and i will send some .nef's.
i also have the .XCF file if that interests you as well (gimp file format) i believe i can save it as a photoshop file, but i am not sure.
the .xcf contains all layers withs masks and a better portion of the history.