  Recently, a proposal (by R.N.M. and S.N.) was made for a new class of gauge
mediated supersymmetry breaking (GMSB) models where the standard model gauge
group is embedded into the gauge group $SU(2)_L\times U(1)_{I_{3R}}\times
U(1)_{B-L}$ (or $SU(2)_L\times SU(2)_R\times U(1)_{B-L}$) at the supersymmetry
breaking scale $\Lambda$. Supersymmetry breaking is transmitted to the visible
sector via the same fields that are responsible for gauge symmetry breaking
rather than by vector-like quarks and leptons as in the conventional GMSB
models. These models have a number of attractive properties such as exact
R-parity conservation, non-vanishing neutrino masses and a solution to the
SUSYCP (and strong CP) problem. In this paper, we present the detailed
sparticle spectroscopy and phenomenological implications of the various models
of this class that embody the general spirit of our previous work but use a
larger variety of messenger fields. A distinct characteristic of this class of
models is that unlike the conventional GMSB ones, the lightest neutralino is
always the NLSP leading to photonic events in the colliders.
