2011/May/05 mc_175.tgz is the current production montecarlo code (GEANT4+Root) di_197.tgz is the latest digitization module (it can ingest data from mc_175.tgz, NOT from r221/mc). In di/doc there are the latex file to generate a sort of algorithm manual. mc_224.zip contains the latest mc code; note that digitization (di_197) is not yet compatible with this version of the montecarlo!