This has been leaked on the web since Black Ops II was released but alot of PS3 Cod Modder's do not know as these files are 360 but within this .xex they still have mflags function and other function/Dvar that isn't patched/removed yet as in full game they removed alot of it meaning this .xex could help you to rebuild Dvar or function that don't work on latest title update for 360 or PS3
If you want the full beta google it as it on the web via torrent site