This Model Driver implements a C^2 continuous Morse pair potential with its tail given by a fifth-order polynomial. It takes five parameters: (1) the cutoff separation in angstroms, (2) the transition percentage defining the size of the tail, (3) the epsilon parameter in eV, (4) the C parameter in inverse angstroms, and (5) the equilibrium pair separation 'Rzero' in angstroms. The potential is C^2 continuous and has zero for its value and first and second derivatives at the cutoff separation.