Mallwalker did post an AviSynth script for the DarkSega rips of ESB and ROTJ when he reposted them on a.b.sw. Snipt's server isn't working for me right now, so I can't access it, and I don't really have any AviSynth experience anyways.
I'm not sure whether the "silently rejected" means that nobody has used his script yet, or if it's referring specifically to the X9s.