  We present a simple and phenomenologically acceptable extension of the 4-1
model of dynamical supersymmetry breaking, in which messengers and MSSM
superfields are directly coupled to the hidden sector without participating in
the supersymmetry breaking mechanism; although parametrically suppressed by a
loop factor, gaugino masses turn out to be comparable to sfermion masses
because of the presence of enhancing factors ultimately due to the different
origin of the gaugino and the sfermion mass terms. We also describe what can be
considered the simplest realization of the Higgs sector and how electroweak
symmetry breaking can take place in this model. Finally, in the Appendix, we
have listed a set of closed-form expressions for the computation of $A$-terms
and soft squared masses of light scalars at the messenger scale in the presence
of the most general form of "matter-messenger" couplings, extending in this way
some results already known from the literature.
