It's not as simple as that. I will try to be as short as possible. Editing FIFA is illegal. We all know that. Still we can do it. But if someone create a fifamod, it's the same gray zone as editing vanilla FIFA. Yes, it can be done. It's not as simple as it is from FIFA. But you shouldn't be doing it. That's how it works. Wanna have assets so you can edit the player or convert it to different FIFA? Ask the author. But don't try to extract anything. It's like you are trying to steal from others. I can go on and on why you shouldn't ask it or do it but as I said. Respect the author and don't ask how to steal.