A description is presented of how to use the Sky3D time-dependent
Hartree-Fock code to calculate giant monopole resonances. This requires
modification to the code, and a step-by-step guide of how to make the necessary
modification is given. An example of how to analyse the output of the code to
obtain quantities of physics interest is included. Together, the modifications
and the post-processing are intended to serve as a typical example of how the
code, which was designed to be extendable to particular users' needs, can be
extended.Comment: submitted to Proceedings of the International Workshop on Nuclear
Theory 33 (Rila, Bulgaria