EventSelector = Service( "EventSelector" )
EventSelector.EventsPerRun   = 1000000000
EventSelector.RunNumber      = 110
EventSelector.FirstEvent     = 1

****************************************************
in case of "theApp.setup( MONTECARLO )",
EventSelector is set to be
"Generators/McEventSelector/McEventSelector-01-02-00/src/McEventSelector.cxx". 
(see /Control/AthenaCommon/AthenaCommon-02-00-21/share/*py)