I used a dummy account and logged it in as a guest with my main (unmodded) and it was a Lt. Colonel G3.. If I were to replace my main's .gpd file, would it completely reset me or would I be a Lt. Colonel G3?
When you change your nameplate online or start a download it starts when you start a game and play for so long. So I was thinking what happened if you had your account on a memory card/USB started a game, unplug your Memory Card/USB switch the GPD on your account then reinsert your Memory card/USB. It may update or may not but its worth a try.
Or do something like how you change your name on MW2.