You can find attached pythia 6 and the patched file. Please, follow the instructions below to install it. It is also convenient to use MadGraph 2.4.3 as it is the latest version automatically interfaced to pythia 6. Please use the following commands to replace the file and re-compile the pythia-pgs. ####################### tar zxvf pythia-pgs.tgz rm pythia-pgs/libraries/pylib/src/pyremn.f cp pyremn.f pythia-pgs/libraries/pylib/src/ cd pythia-pgs/libraries/pylib/ make cd ../../ #(inside the directory pythia-pgs) make ####################### For the pyhtia card make sure that the following settings are used: > !...Parton showering on or off / QCD ISR off MST(61)=0 > MSTP(61)=1 > MSTP(71)=1 > > !...Fragmentation/hadronization on or off > MSTJ(1)=1 > > !...Multiple interactions on or off > MSTP(81)=0 (perhaps using 20 is perhaps better (MPI still off)) For generating a process, put `p e- > XXX' instead of `e- p > XXX'. pT cuts: jets 5 GeV and leptons 5 GeV