  We reexamine the problem of delocalization of two-dimensional electrons in
the presence of random magnetic field. By introducing spatial correlations
among random fluxes, a well-defined metal-insulator transition characterized by
a two-branch scaling of conductance has been demonstrated numerically. Critical
conductance is found non-universal with a value around $e^2/h$. Interesting
connections of this system with the recently observed B=0 two-dimensional
metallic phase (Kravchenko et al., Phys. Rev. B {\bf 50}, 8039 (1994)) are also
discussed.
