Hey Clive,
You could create two versions of the course, and control the visibility of the tracked course using Audience visibility - so learners see the real course when they become part of an audience - say on completing an quiz in the dummy course (Q1 - do you wish to take this course?).
Or maybe you could use the restrict access functionality (previously known as conditional access) which allows you to set certain criteria that must be met for learners to view and/or complete an activity or resource, for another tracked copy of the SCORM in the same course.
hope this is useful,
cheers,
George.