Nero 6 = no layer break optimisation (it seems they didn't even know what's a layer break when burning a DVD+R DL!)
Nero 6 = no long volume name support.
Just burn a "MASTER_AND_COMM" for "MASTER AND COMMANDER". With VSO, Copy2DVD no problems... It's automatic, the default label is the VIDEO_TS parent directory.
Nero 6 = only for Single Layer DVD or CD with short volume names...