  The complete matrix elements for e^+ e^- -> 4f and e^+ e^- -> 4f + gamma are
calculated in the Electroweak Standard Model for polarized massless fermions.
The matrix elements for all final states are reduced to a few compact generic
functions. Monte Carlo generators for e^+ e^- -> 4f and e^+ e^- -> 4f + gamma
are constructed. We compare different treatments of the finite widths of the
electroweak gauge bosons; in particular, we include a scheme with a complex
gauge-boson mass that obeys all Ward identities. The detailed discussion of
numerical results comprises integrated cross sections as well as photon-energy
distributions for all different final states.
