I've already managed to "unlock" well hidden option to actually have real players in Master League mode, but the fake (made up by Konami) players are still there and are even suggested when you for example go to the transfers. How to turn them off and leave only the real players, the authentic ones?
Yeah... excellent question. I do it two months ago using the PES Editor 2012, that and change the teams on the official leagues (like spain). I like play Master League without classical players and in a "ficticious" league with all of the best teams (Barcelona, for eg) and you can't do it without moving / replacing / deleting teams and players.