I'm not a programer, but I'm trying to edit a .ifo file from a dvd authored with DVDlab to make the Audio Menu functional. I1ve created 2 buttons (LPCM and AC-3) linked with AUDIO MENU) on DVD lab, but I need now to link this bottons using IFO EDIT editing pre commands using HEX codes. I would apreciate any help to find a way to make possible to make the audio menu functional on my DVD .