Just out of curiousity given that I'm currently having a similar conversation via e-mail with Ronan from Insomnia: are you discussing this matter on Insomnia's internal forum right now and is Icycalm telling you all that he needs my approval for this stuff? If so, wouldn't it be a better idea getting me unbanned there in order to consolidate (just saying, Icycalm)?
I'm repeating here what I told Ronan before anything, since it concerns your question almost to the point of turning it irrelevant:
First off, you must know I don't actually like any scanlines simulation at this resolution range, nor even the one I got (and indeed I'm redesigning my Site in order to totally change the screens).
In other words: 640 x 480 screenshots for low-res games should be discarded since we just can't get proper results and do the games justice. This is not exactly a good photo, but we should be aiming, at least, for this result:
http://i50.tinypic.com/1zpmzbt.jpg
Said that, your first screen looks like shit, I'm afraid, while your second one, as passable as it can get at that resolution and without curvature, per-pixel edition and whatnot, I guess. The current samples at Insomnia's Shatterhand hand review are actually better accuracy-wise, since the NES was never able of outputting RGB.
Are you using Irfan View?
"I also used the emulator's TV size switch rather than correcting the aspect ratio manually. What do you think?
It apparently has a quite correct aspect ratio there, doesn't it? You do know that 4 : 3 is the number, right?