There are 2 steps to be done by users; the integration step and the event generation step. In the integration step, an effective total cross-section and probability distributions are calculated by the program BASES [12] running the executable file integ. The resulting information is stored in the file bases.rz. In the event generation step by running the executable file spring, unweighted events are generated by the program SPRING [12] according to the probability distributions in bases.rz. You can get the information on the generated events from the common block /PYJETS/ provided by PYTHIA which can be found in the file usrstr.f. Program parameters are controlled editing the file cards which is read on executing integ or spring. Fig.3 shows the flow of the above procedure.
