I believe he's talking about taking the PAL GOUT German audio tracks and putting them in sync with the NTSC GOUT video. ("BTW to have the German tracks be in sync with Harmy's video track...") He says that Empire and ROTJ are pretty easy to resync but that the German track for the original Star Wars is more difficult and that the dialogue isn't really in sync with the rest of the sound.

This makes sense considering the sound was remixed for the Definitive/Faces collection and I guess that the sound mixer putting together the new mix for the German release didn't get the dialogue track quite in sync with the other Effects/Music tracks.

In any case, I don't think he's talking about the English track at all, and thus it would be safe to take the PAL ROTJ English track, slow it down 25fps to 23.98 fps and use it as a reference for the editing of the digital track.