I thought I had read somewhere that you can place chapter markers on the Vegas time line, render to MPG2 and DVDa will be able to find the chapter markers. Is this correct? if so, is there a trick to getting this done?
Also, make sure you don't move the MPEG2 file to another subdirectory. The marker information is stored in a separate file. If the file is not found, the marker information will not be read.