making changes to the Popup after enrolling on Course

Hi,

I need to make some changes to the popup that is generated after a user enrolls on a course
see screenshot - http://take.ms/RHfxz

Domain & course page - http://tinyurl.com/q58ogld
Im using a plugin called Switch user. If logging in as admin through support access navigate to the users area then hover over SAM and switch two - for testing as a regular member

From there enrolling on course to see the pop up

Support access is ACTIVE until September 5, 2015 3:03 am

Thanks

Tom