I live in Atlanta, Ga. My wife currently has physical custody and we both have legal custody of our 11 year old. She has decided that due to some extreme stress in her home, that my son should come and live with me full time. She has agreed to give me physical custody. What do I need to do to have the custody modified? Our original divorce was grnted in Barrow county, but now we both live in Fulton county. I assume we need to have this done through the court? How involved is the process when both parties agree?