Thanks for the answer.
I like the sound of the Aggregator tool as it seems to break the course down nicely.
May I repeat: The Aggregator tool that comes with Captivate is NOT designed for courses that need to report scoring or interaction data to an LMS or LRS.
Though Storyline may allow you to have multiple Quiz Result slides scattered throughout your course, at the end of the day, if you submit a multi-module course to the LMS as a SINGLE shareable content object (SCO for short) then the LMS will only see it has having one quiz. The extra Quiz Result slides that Storyline allows you to create do not effectively mean the LMS sees the course as a Multi-SCORM course.
Captivate only gives you one built-in Quiz Result slide even though you can mock up your own faux result slides for individual sections of your course if you want to use variables and Advanced Actions. But again, if you want the LMS to see your course as a Multi-SCORM, you need to be using a separate CPTX file to create each of the individual SCOs that get bundled by the Multi-SCORM Packaging tool. That tool then takes care of the coding required in the imsmanifest.xml file that the LMS looks at when working out how the course is structured.