Geant4 and TOP-C
Get the Code:
1) Checkout http://www.ccs.neu.edu/home/gene/pargeant4-cern.html
2) wget ftp://ftp.ccs.neu.edu/pub/people/gene/topc/topc.tar.gz
3) wget http://ftp.ccs.neu.edu/pub/people/gene/marshalgen/marshalgen.tar.gz
4) unpack and install
5) Test setup with ParNO2
6) aim for MPI integration (cluster runs):
http://www.ccs.neu.edu/home/gene/topc/topc_toc.html
and more specifically http://www.ccs.neu.edu/home/gene/topc/topc_13.html#SEC61