I just got a new BD reader for my pc so of course I want to try out some HD tools.

I noticed that the output from BDRebuilder includes an empty folder called BDJO but Powerdvd will not even recognize the structure with that folder. If the BDMV folder contains a subfolder called BDJO then the movie selection "ok" button is grayed out. If I remove the empty folder then the movie plays fine and for a full version movie with extras all the menus are completely available.

Why won't Powerdvd play a movie with a BDJO empty folder and why do some of these tools include it if it's empty and not needed?