that happens in the option files because these players edit their statistics or loot or some aspect of the players born after 2000 when doing this the age remains at 60 or higher it has nothing to do with the base it is already in the edition that they have done manually from the console
editing the overlays is simple you just open it with fifa explorer, extract the images and edit to your liking, then put them back in the bigs file is all
If I'm not wrong on ps3 yes or if you must regenerate the big0.bh to take the changes, now it also depends on what changes you made some tables are linked to others
friend uses db master version 14.0 besides that before opening it you must pass it to pc format the program is called db converter and then you can open it with db master
that is, if the texture of the face is reduced with fifa converter, it becomes unbalanced, it would be necessary to do it manually with blender, you can put the original on it and it would look good, and the hair as it turned out