I’ve not seen any region code software hacks for Blu ray players.
From Wikipedia: [I]Unlike DVD region codes, Blu-ray region codes are verified only by the player software, NOT by the drive and the computer operating system. The code is stored in a file of the player program or in the registry. In stand-alone players, it is part of the firmware.[/I]
There are companies that modify the hardware of some stand alone Blu ray players, changing the firmware of the players to be region free. Search Google for blu ray mods.