To all RE-4 folks:
I have talked with over 100 people with the RE-4 code for reenlistment and none of them have been able to get it changed. Once there, as mentioned, few get it changed.
You may just want to understand that military life is not what you are going to do. There are many other fields of work like Blackwater or another group that will take you.
Good luck folks with moving on with your life.