  We present analysis of the cross-over behavior of disordered interacting
two-dimensional electron systems in the parallel magnetic field. Using the
so-called cross-over one-loop renormalization group equations for the
resistance and electron-electron interaction amplitudes we qualitatively
explain experimentally observed transformation of the temperature dependence of
the resistance from a reentrant (nonmonotonic) behavior in relatively weak
fields into an insulating-type behavior in stronger fields.
