Well, I don't know how, but I just fixed it. I don't know what I did different than yesterday, cos I tryed this yesterday too and it didn't work. I used ifoedit to create a new ifo for each set of vobs that needed to be updated, and than ifoupdate, and used the new ones as authored ones, and it worked. I just burnt the disk and it works as is supposed to. So this is it. Thanks for trying to help.