Have you tried Jing yet? Here's a link to my first try using Jing. This is a video of my screen as I am showing someone how to do the one-time setup for NetFiles.
Then I used Jing to do a screen capture of the dirtools or myaccount page, using the Jing tools to highlight areas of the page, the arrow to point to the specific link on the page that the user must click on to set up NetFiles. Here is the result: