Second, there's an obvious kinda yellow tint in that scene, at least in the shadows.
In GOUT, that scene is kinda cyan/blue-ish which means if I match it to that screenshot, more yellow scenes like some on Tatooine will be VERY yellow. The ending ceremony is also a bit too yellow already with my settings.

I think it's obvious that the GOUT comes from some much more inconsistent prints than the Senator version. Had the GOUT been sourced from a technicolor print, it would've been MUCH easier to dig up all that color the right way.

So bottom line, don't get your hopes up too high! I'm still trying to balance everything though, and to find a better way to increase saturation, so I might find a way to make it look better, but it won't ever be close to technicolor.

Well the way I imagine (i stress the word imagine) the light is falling and changing in the tantive corridor is like in this frame from 2001 - you see it can be blue in one corner and purple and yellow in another. Now the lighting in the tantive corridor wouldnt be anywhere as dark as this but this is how i explain the changes.

http://hopeliesat24framespersecond.files.wordpress.com/2011/06/7.jpg

The alternative is they were using different colour filters within the same sequence when shooting...

I can't really add any more ideas at this point without knowing more about how color correction is done. You may have to sit on this a while and wait for inspiration !