Thank you all very kindly for your praise & comments, I must say that my screen shots are only as good as the addons I capture and in this case the combination of PMDG's 747 with McPhat HD repaints at FSDT's latest masterpiece, it is easy to capture very nice screen shots.
As for ENB, I tend to keep it mostly on default ini setting, only sometime varying the daylight Bloom settings. I personally find that changing REX's day time theme, adjusting time of day within FSX and the angle of the shot, can have a dramatic effect on the lighting in your screen shots, so I suggest try and experiment with those factors.