  We present a new method devised to overcome the intrinsic difficulties
associated to the numerical simulations of the Tsallis statistics. We use a
standard Metropolis Monte Carlo algorithm at a fictitious temperature T',
combined with a numerical integration method for the calculation of the entropy
in order to evaluate the actual temperature T. We illustrate the method by
applying it to the 2d-Ising model using a standard reweighting technique.
