substitution is discretionary. COUNSEL: James T. Patterson, Sr., Pro Se, Riverdale, Georgia, for Appellant. William N. Withrow, Jr., Tench C. Coxe, J. Kirk Quillian, Atlanta, Georgia, for Appellee. Joseph B. Haynes, Atlanta, Georgia, for Appellee. A. Vernon Carnahan; Daniel R. Murdock, New York, New York, for A