diff --git a/GeneratorInterface/LHEInterface/data/run_amcatnlo_tarball.sh b/GeneratorInterface/LHEInterface/data/run_amcatnlo_tarball.sh
new file mode 100755
index 0000000000000..aa96ef388a981
--- /dev/null
+++ b/GeneratorInterface/LHEInterface/data/run_amcatnlo_tarball.sh
@@ -0,0 +1,99 @@
+#!/bin/bash
+
+#set -o verbose
+
+echo "   ______________________________________     "
+echo "         Running Madgraph5                    "
+echo "   ______________________________________     "
+
+repo=${1}
+echo "%MSG-MG5 repository = $repo"
+
+name=${2} 
+echo "%MSG-MG5 gridpack = $name"
+
+nevt=${3}
+echo "%MSG-MG5 number of events requested = $nevt"
+
+rnum=${4}
+echo "%MSG-MG5 random seed used for the run = $rnum"
+
+LHEWORKDIR=`pwd`
+
+if [[ -d madevent ]]
+    then
+    echo 'madevent directory found'
+    echo 'Setting up the environment'
+    rm -rf madevent
+fi
+mkdir madevent; cd madevent
+
+# retrieve the wanted gridpack from the official repository 
+fn-fileget -c `cmsGetFnConnect frontier://smallfiles` ${repo}/${name}_tarball.tar.gz 
+#cp -p /afs/cern.ch/work/b/bendavid/CMSSWgen62/genproductions/bin/aMCatNLO/${name}_tarball.tar.gz ./
+
+#check the structure of the tarball
+tar xzf ${name}_tarball.tar.gz ; rm -f ${name}_tarball.tar.gz ;
+
+# force the f77 compiler to be the CMS defined one
+ln -sf `which gfortran` f77
+ln -sf `which gfortran` g77
+PATH=`pwd`:${PATH}
+
+cd mgbasedir/${name}
+
+#replace the seed in the run card with ${rnum}
+sed -i "s#[0-9]\+ *= *iseed# ${rnum} = iseed#g" Cards/run_card.dat
+
+#replace the number of events in the run_card
+sed -i "s#[0-9]\+ *= *nevents# ${nevt} = nevents#g" Cards/run_card.dat
+
+run_card_seed=`fgrep "${rnum} = iseed" Cards/run_card.dat | awk '{print $1}'`
+run_card_nevents=`fgrep "${nevt} = nevents" Cards/run_card.dat | awk '{print $1}'`
+  
+if [[ $run_card_seed -eq $rnum ]] ;then
+  echo "run_card_seed = ${run_card_seed}"
+else 
+  echo "%MSG-MG5 Error: Seed numbers $run_card_seed doesnt match ( $rnum )"
+  exit 1
+fi
+
+if [[ $run_card_nevents -eq $nevt ]] ;then
+  echo "run_card_nevents = ${run_card_nevents}"
+else
+  echo "%MSG-MG5 Error: Number of events $run_card_nevents doesnt match ( $nevt )"
+  exit 1
+fi
+
+if [ -f Cards/madspin_card.dat ] ;then
+  #set random seed for madspin
+  rnum2=$(($rnum+1000000))
+  sed -i "s#\# set seed 1# set seed ${rnum2}#g" Cards/madspin_card.dat
+  madspin_card_seed=`fgrep " set seed ${rnum2}" Cards/madspin_card.dat | awk '{print $3}'`
+  if [[ $madspin_card_seed -eq $rnum2 ]] ;then
+    echo "madevent seed = $rnum, madspin seed = $rnum2, madspin_card_seed = $madspin_card_seed"
+  else
+    echo "%MSG-MG5 Error: Madspin seed $madspin_card_seed doesnt match ( $rnum2 )"
+    exit 1
+  fi
+fi
+
+#generate events
+bin/generate_events -fox -n ${name}
+
+if [[ -d Events/${name}_decayed_1 ]]
+    then 
+    mv Events/${name}_decayed_1/events.lhe.gz $LHEWORKDIR/${name}_final.lhe.gz
+else
+    mv Events/${name}/events.lhe.gz $LHEWORKDIR/${name}_final.lhe.gz
+fi
+
+cd $LHEWORKDIR
+gzip -d ${name}_final.lhe.gz
+#cp ${name}_final.lhe ${name}_final.lhe.bak
+
+ls -l
+echo
+
+exit 0
+
diff --git a/GeneratorInterface/LHEInterface/src/LHEEvent.cc b/GeneratorInterface/LHEInterface/src/LHEEvent.cc
index b27ab6484da24..1eeca224e6b15 100644
--- a/GeneratorInterface/LHEInterface/src/LHEEvent.cc
+++ b/GeneratorInterface/LHEInterface/src/LHEEvent.cc
@@ -104,15 +104,6 @@ LHEEvent::LHEEvent(const boost::shared_ptr<LHERunInfo> &runInfo,
 	    } else
 	      continue;
 	  }
-	  size_t found = line.find("amcatnlo");
-	  double NEVT = 1.0;
-	  if ( found != std::string::npos) {
-	    std::string avalue = line.substr(found+1,line.size());
-	    found = avalue.find("_");
-	    avalue = avalue.substr(found+1,avalue.size());
-	    NEVT = atof(avalue.c_str());
-	  }
-	  hepeup.XWGTUP = hepeup.XWGTUP*NEVT; 
 	  comments.push_back(line + "\n");
 	}
 	
diff --git a/SimDataFormats/GeneratorProducts/src/LHERunInfoProduct.cc b/SimDataFormats/GeneratorProducts/src/LHERunInfoProduct.cc
index fe67c88ed5894..c97d8de2e95f5 100644
--- a/SimDataFormats/GeneratorProducts/src/LHERunInfoProduct.cc
+++ b/SimDataFormats/GeneratorProducts/src/LHERunInfoProduct.cc
@@ -239,7 +239,11 @@ bool LHERunInfoProduct::mergeProduct(const LHERunInfoProduct &other)
 			if (header->tag() == "" ||
 			    header->tag().find("Alpgen") == 0 ||
 			    header->tag() == "MGGridCard" ||
-			    header->tag() == "MGGenerationInfo") {
+			    header->tag() == "MGGenerationInfo" ||
+			    header->tag() == "MGRunCard" ||
+			    header->tag() == "mgruncard" ||
+			    header->tag() == "MadSpin" ||
+			    header->tag() == "madspin") {
 				addHeader(*header);	
 				headers.insert(*header);
 			} else