I have tried DVDLabPro but i can't figure out how to import complete dvd, with all menus and extras. Is it possible to add custom subtitles, and keep other things on dvd (menus, subtitles, extras) ???
If you can discard one of the subtitles and replace it with your own then I think a guy on Doom9 is working on a tool for that. Try the Subtitles Forum on http://forum.doom9.org/ I think he's talking like a DVD that's already authored or ripped. Finding a quicker way to put in a custom subtitle. Not stuff for original work. But still you might learn something about how subtitles work there.
Thanks for reply, that exactly what i wanted, something to replace one of subtitles with another language, which i don't need I'll check this out, i knew about doom9.org but haven't know about this program.