1.) copy BLUS or BLES files to a FAT32 USB Key/USB Disk
2.) install the *DUPLEX*.Patch.v1.01.pkg
3.) install the *DUPLEX*.Crack.pkg
4.) run game from multiman and let it patch your param.sfo (alternatively take the one from our pack and replace it manually)
5.) play from xmb on your cfw 3.55 !