Empty folders in PS3 JB Folder Dumps

Vimm, the Assassin's Creed games require an ASSASSIN_ISO folder located inside the PS3_GAME/USRDIR/ directory in order to run properly. The real disc of these games include the folder in the filesystem header, but as far as I can tell the .7z archives of the games in the vault do not include it.

Now, I think it would be better to include the folder in the vault's archives by default so that users do no have problems running these games thinking the dump is incorrect. So, I wonder if 7z is automatically ignoring this folder when building the archive: https://sourceforge.net/p/sevenzip/discussion/45798/thread/85056ff6/. Or maybe the PS3 dumping utility that is being used is ignoring the folder? Either way, maybe the folder can be added manually since it will still be ignored when rebuilding the game with an IRD?