Hi Matthew,
You can add the .js to the JavaScript files list in the WebServer procedure.
You can also add the .css file to the list of Style files in the WebServer procedure.
After that you will need to hand-code the menu in a NetWebSource procedure to conform to the html requirements of the script you've chosen. The menu extension template doesn't support that script directly, so it won't be of any use to you.
cheers
Bruce