thanks for all the answers and suggestions.
@oojason
My standalone (and regionfree) DVD Player and tv are NTSC compatible. I am doing this because IMHO PAL is the superior format, not because I can't watch NTSC discs.
The only disadvantage of PAL is the speedup from 24 to 25 fps, but to me this isn't really noticable while watching a movie.
@skywalka
Good for you (and Australia). ;-)
@Laserschwert
I will try some of the filters you suggested and post the results on my site. I will contact you when I am finished with DVDs.
@DanielB
The VHS audio track was the easiest to get and use for my first draft DVD. I am still trying to get english OT PAL THX LDs, but up till now I never saw them on Ebay.
Using the audio track from TR47 DVDs is a good idea and I will try this. I know Besweet has an option to change audio to match a certain framerate. I hope this works well and the quality is good. Another possibility is to cut the new scenes out of an SE audio track to match the OT version. This way I could make real 5.1 tracks, although this might be a lot of work (and I have never done this before). But I probably stick with Prologic encoded 2.0 tracks anyway.
Another good idea is to use footage from Special Edition LDs. I also have these british PAL SE LDs, so indeed I could use some scenes from these discs. Unfortunately this is no option for the Greedo scene.
Dual audio is something I will definitly do, because these DVDs are primarily intended for myself and some (german) friends.
In my opinion using a LPCM stream is actually much worse than using 2 ac3 audio tracks.
Anamorphic is no must, but I still think it gives better quality on 16:9 tvs and no noticable quality loss on 4:3 tvs.
I spend quite some time creating the DVD menus (especially the root menu), so please tell me what think abou these.
Greetings,
Grisan