First off I would like to say, you do some good photoshop work. I guess im going to have to break out my real PSD skills to keep up around here, and stop messing around. I didnt think there would be any good photoshop ppl on here.
As far as an evalutaion, im sure you know that your image gets grainy in the sections that youve changed out, you can actually help that out using the same techniques, they use on models, for magazines, with airbrushing and bluring. hey man, PM me sometime, I always like to meet new Design People!