Event generation using stdhep
stdhep can be obtained from:
http://cepa.fnal.gov/psm/stdhep/getStdHep.shtml
Event generation on ilcsim:
On ilcsim stdhep is provided via ups/upd. Instructions can be found at:
https://cdcvs.fnal.gov/redmine/projects/lcsim/wiki/Pythia_To_Stdhep_%28new%29_