Now that the ghost-removal has hit its (current) limits, I tried myself on improving the quality in some other areas. One of the visible artifacts in the image were jaggy diagonal lines, which I tried to smooth out using the SangNom deinterlace filter for AviSynth. Its actual purpose is to make deinterlaced material progressive, meaning the jaggy lines resulting from deinterlacing an interlaced source being smoothed to improve resolution. Here are some captures I took from Gonzo's set, comparing its original state as taken from the DVD with the optimized version, using the SangNom filter (and the LimitedSharpen filter, to compensate for any blurring resulting from it):

http://www.scummbar.com/mi2/temp/opt0.gif

http://www.scummbar.com/mi2/temp/opt1.gif

http://www.scummbar.com/mi2/temp/opt2.gif

And here's an MPEG (ca. 10MB) showing Zion's capture switching between its raw version and my optimized version (ghost-removal, jaggy-smoothing, contrast-correction).

The result is already pretty nice, but there are some situations, where SangNom causes artifacts to occure, like detail areas, where the filter can't differenciate between jaggies and detail. Some examples are the letters from the opening crawl as they get smaller, and some of the space-ship details. But judging from the few miutes of film I've tested this on, these artifacts might be negligible, regarding the quality boost in most other scenes. Maybe it's even an option to combine filtered and unfiltered scenes in editing... though I would understand if Zion doesn't want to do this