  In the context of the minimal supersymmetric extension of the Standard Model
with the right-handed Majorana neutrinos, we study lepton flavor violating
processes including full renormalization group running effects. We
systematically compare our results with the commonly used leading logarithmic
approximation, resorting to a ``best fit'' approach to fix all the high energy
Yukawa matrices. We find significant deviations in large regions of the SUSY
parameter space, which we outline in detail. We also give, within this setting,
some results on the cosmo-phenomenologically preferred stau coannihilation
region. Finally, we propose a parametrization, in terms of the SUSY input
parameters, of the common SUSY mass appearing in the leading log and mass
insertion approximation formula for the charged lepton flavor violating decay
rates, which fits our full renormalization group results with high precision.
