0SCEM_3 Group of Event Configuration and Data Source

Hello, I am currently configuring the 0SCEM-3 group of events extractor and from what I can understand the extractor will create one record for each Group ID that is configured and each Group ID can have up to 15 duration calculations, am I understanding this correctly?  Also, on the data source itself in the BW system there are some fields that are in groups of 5 i.e. EVENT_CODE_01 through EVENT_CODE_05 and I don't understand how/why these would be populated.  I and still waiting for some test data to be entered but thought I might get a jump ahead with any experience out there.  Thanks in advance, Scott