  We present two dimensional cylindrically symmetric hydrodynamic simulations
and synthetic emission maps of a stellar wind propagating into an infalling,
rotating environment. The resulting outflow morphology, collimation and
stability observed in these simulations have relevance to the study of young
stellar objects, Herbig-Haro jets and molecular outflows. Our code follows
hydrogen gas with molecular, atomic and ionic components tracking the
associated time dependent molecular chemistry and ionization dynamics with
radiative cooling appropriate for a dense molecular gas. We present tests of
the code as well as new simulations which indicate the presence of
instabilities in the wind-blown bubble's swept-up shell.
