  The AcerMC Monte Carlo generator gives a possibility to generate some of the
Standard Model background processes which were recognised as very dangerous for
the searches at LHC, and generation of which was either unavailable or not
straightforward so far. The program itself provides a library of the massive
matrix elements (coded by MADGRAPH) and native phase space modules for
generation of a set of selected processes. The hard process event can be
completed by the initial and final state radiation, hadronisation and decays
through the existing interface with either PYTHIA 6.2 or HERWIG 6.3 event
generators. A distinctive feature of AcerMC is the efficient phase-space
sampling, achieved by a combination of multi-channel self-optimising approach
and a modified ac-VEGAS routine.
