Thank you. In the past, before I knew what that byte was for, I would have needed to use players I normally wouldn't use as stand-ins for other players (for example, I wound up using Sandis Ozolinsh as a stand-in for a fake player named Fedors Medvinskis (previously known as Fedor Medvinsky)).
But now, I can use this breakthrough (<- this is the word that was supposed to be in the title, but my fingers got the best of me
) to my advantage and choose from the available countries for these players and make the roster even more like what I imagined.