The PKG/RAP ecosystem is now the primary method for :
files are license files. They were originally generated by Sony’s servers to prove you purchased a piece of content. When you bought a game, your console downloaded a unique RAP file that unlocked the corresponding PKG. Ps3 Pkg And Rap Files
If you are using , ensure HEN is enabled. Most modern versions of HEN and CFW will automatically "grab" the RAP file from the exdata folder on your USB the first time you launch the game. The PKG/RAP ecosystem is now the primary method