Correction: Author. Identify the chapter where you wish to place the layer break in DVDMaestro. Close without changing compile.
Open PGCEdit, load title, tick layer break and select desired chapter. Close.
Navigate to VIDEO_TS and delete the PGCEdit backup folder.
Burn as data in RecordNow 7.2
Check the link: http://www.videohelp.com/forum/viewtopic.php?t=225001&highlight=edmund+blackadder
[EDIT] I have an idea DVDMaestro isn't absolutely necessary. But as I said, supposedly this works. Haven't tried it. If interested, better read it all yourself, it's a long thread.