I also use nero and when i burnt these to disc nero wouldnt let me put anything besides the vob and such files in (basically could only put the files for the video_ts folder) i couldnt put on the Jacket_P, Contents, or DVDRom folder
some searching and i found this a program called imgTool you can get it from http://www.coujo.de/
it allowed me to burn everything on the disc and the disc played fine. it actually uses the nero burning engine to do the actual burning