Here is the archive of my work files: link.
The files 'thx-a.avs' and 'thx-b.avs' contain the averaging of 5 sources, IVTC, rainbow reduction and global stabilisation (by G-force, actually). 'thx-stage2.avs' contains the rest.
My only real regret is that I couldn't figure out a good way to reduce ringing.
Regarding the sharpening, I don't think it looks good at all. But I did the MKV with a high bitrate so anyone who wants to alter it or convert it to DVD or whatever can have a good starting point. So if you want to sharpen it... :)