Update
I managed to find a solution to the problem above.
Basically for cfw you just download a program called ReactPSN to your ps3 and use PSN stuff which is a Pc program that let's you download ps3 pkg files of your game/dlc . Download the rap files for the games that you want, put them in a folder called 'exdata' on the root of your USB and activate them by following the ReactPSN method. This will activate the license of the game/dlc of the game you installed.