Maybe writing a player VM?
bd+ is a disc security program that runs in player vm. F4 protection is different than Day after tomorrow! so they can not break bd+ completely, only each disc. It is exciting to see what they try :agree:
Good luck 8) bd+ developer's claim is that vm is only used to run the code -- for compatibility only! It checks actually player itself to see if it is real or not. So you have to write a perfect player not just vm.