  We describe an additional module for the Mathematica package FeynRules that
allows for an easy building of any N=1 supersymmetric quantum field theory,
directly in superspace. After the superfield content of a specific model has
been implemented, the user can study the properties of the model, such as the
supersymmetric transformation laws of the associated Lagrangian, directly in
Mathematica. While the model dependent parts of the latter, i.e., the soft
supersymmetry-breaking Lagrangian and the superpotential, have to be provided
by the user, the model independent pieces, such as the gauge interaction terms,
are derived automatically. Using the strengths of the Feynrules program, it is
then possible to derive all the Feynman rules associated to the model and
implement them in all the Feynman diagram calculators interfaced to FeynRules
in a straightforward way.
