Modify track and completion progress

Hello, it is my first post.

Sorry if this isn´t the correct category for this post.

I have a scorm course published with articulate bought to my course provider (i can´t republish the course)

I want change the way that it track the progress, i want modify presentation.xml and change the value that set this option for track using numer of slides viewed instead of quiz result.

is it possible?

thanks for the answers.