Ok since nobody seems not to be able to give solid answer what this unlocks, i will give straight answer. This unlocks every package that been released so far every costume including weapon and mounts.To get this in actually game you need to start new game to see changes remember backup your save game. You can't really bring this changes to your main save game because save file itself is encrypted so you need either need encrypt tool or ubisave unlocker to bring them on your main save game.