Hi Harmy,
someone should get you a better computer. There should happen some fundraising at originaltrilogy.com. I would throw in some bucks! ;)
Since I enjoy your effort very much, I have to tell you the one thing, that throws me out, when I see the edit: The mattes.
The problem is: It's always visible when you use a still picture, because suddenly there is no more movement in the picture. I thought about it.. it's very hard to give a still image the feeling, that it's part of the moving film.. little movement would be needed, that is happening in the normal shots.. maybe more grain, but I don't know if that would help.
Sometimes I am not sure, if it's always for the best looking experience to go for "as much HD as possible".. maybe it would sometimes be better to use as much "moving picture" as possible, even if it is from lower resolution..
An example is the shot at Mos Eisley. It's very obvious that it's a still frame, because it has a lot less movement, than the shots before and after..
Maybe you could try playing with some "old movie" filter for afx. Do you have some of those? Just putting a bit of film jitter on it obviously with very small ammounts could help. For the subconcious eye its not just about the grain, it's always about this those tiny shakes and movements of the picture, that come from scanning original 35mm films. Obviously in completely digital movies, there are sometimes shoots like that, but that's what this editions shouldn't look like: digital! ;)
I don't know if others see this too. Maybe I recognize it more, since I watch it enlarged over a projector.
Otherwise: Good work, and I hope the recognition for you will be rising!