Harmy said:

Here's a test if the Luke and 3PO scene could be done just trough colour correction and here is a comparrison with the 2004 colours.

Well that looks great so far (I’m comparing it with my GOUT DVD right now) but I would tone down the reds a bit. Compare it yourself you will see that even though the sky is redder the rest of the image is not. As for the close up shot where Luke starts to say "its too dangerous..." That sky shot is totally different and requires a very red sunset.

Have you considered using a high resolution scan of a similar sunset and composite it in? It’s a very short shot.