Producing gridpack for Wb→Wb scattering using Madgraph (QuickGuideMadGraph5aMCatNLO):

Create cards, examples can be found in ~mpitt/public/TopWidth/cards (folders WBjetToLNu_LO, WAntiBjetToLNu_LO, WBjetToLNuG2_LO and WAntiBjetToLNuG2_LO)

To create gridpacks, execute the following lines:

git clone -b mg27x https://github.com/cms-sw/genproductions.git
cd genproductions/bin/MadGraph5_aMCatNLO/
cp -r ~mpitt/public/Topwidth/cards cards/
cp -r /eos/cms/store/cmst3/group/top/WbWb/cards/* .
./gridpack_generation.sh ST_4f_NLO_offshell cards/ST_4f_NLO_offshell/
./gridpack_generation.sh ST_4f_NLO_onshell cards/ST_4f_NLO_onshell/