  We investigate the building of models with Dirac gauginos and perturbative
gauge coupling unification. Here, in contrast to the MSSM, additional fields
are required for unification, and these can naturally play the role of the
messengers of supersymmetry breaking. We present a framework within which such
models can be constructed, including the constraints that the messenger sector
must satisfy; and the renormalisation group equations for the soft parameters,
which differ from those of the MSSM. For illustration, we provide the spectrum
at the electroweak scale for explicit models whose gauge couplings unify at the
scale predicted by heterotic strings.
