--------- RECIPE for CMSSW_4_2_8_patch7 --------
Instructions from https://twiki.cern.ch/twiki/bin/view/CMSPublic/SWGuideEWKVPlusJets


source /uscmst1/prod/sw/cms/setup/cshrc prod       (at Fermilab LPC only)
setenv SCRAM_ARCH slc5_amd64_gcc434
scram project CMSSW CMSSW_4_2_8_patch7
cd CMSSW_4_2_8_patch7/src/
cmsenv
cmscvsroot CMSSW

###### Check out the following additional packages:

cvs co -r HEAD PhysicsTools/KinFitter
cvs co -r V03-02-07 JetMETCorrections/Configuration     (needed for jet energy correction)
cvs co -r V02-04-17 RecoJets/Configuration     (needed for deterministic FastJet subtraction)
cvs co -r V04-01-00 RecoJets/JetAlgorithms     (needed for deterministic FastJet subtraction)
cvs co -r V00-06-07 RecoJets/JetAnalyzers     (needed for JetId selectors, jet selectors, etc.)
cvs co -r V05-05-03 RecoJets/JetProducers     
cvs co -r V08-06-25 PhysicsTools/PatAlgos     

scram b -j4
cd ElectroWeakAnalysis/VPlusJets/test
gunzip QG_QCD_Pt_15to3000_TuneZ2_Flat_7TeV_pythia6_Spring11-PU_S1_START311_V1G1-v1.root.gz