but they disappeared from my DVD.. and I am so sad about it! What software I can use for writing them back to DVD? and there was 7 files on this DVD. three of them are VOB files, and I can play them on Real Player, but other two are BUP files and last two are IFO files. What does it mean, why all files are in different format, how can I play these 4 non-VOB files, and how I can put them all together on the new DVD? THANKS to everybody!!