GLG4sim is a Generic Liquid-scintillator Anti-Neutrino Detector ("GenericLAND") Geant4 simulation. It has a lot of features that you won't get just by editing the Geant4 examples. GLG4sim is derived from the most general parts of KGL4sim, a Geant4-based Monte Carlo for KamLAND. (See ACKNOWLEDGMENTS.) This code is being made available to the neutrino physics community in the hope it will be useful and in the belief that code of general interest to the scientific community should be shared freely among researchers whenever possible.
Please see Introduction to GLG4sim for a better idea of the features, history, and status of GLG4sim. ("Introduction to GLG4sim" is a copy of slides from a presentation, and contains information that will eventually be incorporated into the documentation.) You may also find the GLG4sim talks from MAND-sim 2005 useful, in particular "GLG4sim tricks".
More links of interest: