Using Storyline to emulate software

We've acquired Storyline primarily to teach various types of software to our staff.  So most of it will require emulating the way the software appears on the screen.  Here is an example that was posted that is pretty much what I need to do all the time.

http://montereymotiongraphics.com/interactive_screenshot/

In this example, the user clicks on the "Adjustments" dropdown and the white dropdown with the options then appears.  Later the  "Render" progress appears to move.

My question is, what is the methodology used to emulate the software like this?  More specifically, when the "Adjustments" dropdown list appears, is that a seperate object (a still of just the white dropdown options) that is manually scaled and manually lined up over the base picture of the software to appear that the software is reacting to the interactive click? 

If so, is it the "TRY MODE" of the Screencast funtionality, or is it all manual scaling and positioning of the individual images to make it "appear" the Storyline presentation is emulating the software?

I need to do this alot and am just trying to figure out what the easiest way to do this type of thing is?  I realize the approach would have to vary based on exactly what you're trying to emulate.

Thanks in advance for any input.