QED radiative corrections, Monte Carlo and spin; the case of τ-pair production in e+e- annihilation

It is shown how to combine Monte Carlo techniques with methods based on spin amplitudes in order to calculate radiatively corrected, integrated, and/or differential QED cross sections efficiently for heavy lepton τ production in an electron-positron annihilation process. A particular emphasis is put on those aspects which are potentially important for future developments for this process, for applications to similar processes (production of heavy quarks) and for other QED processes where mass and spin effects are also important (in addition to the radiative ones). 44 refs., 7 figs. (author)