Update 2017-11-30: reference Mike’s blog for this script. I no longer have my source file for this script.
In some implementations, the progress bar simply gets in the way. I wrote up the following script which calls ang AutoIt application to move the bar and then move the mouse to update the screen. It worked great for my needs!
Script Download: https://panaconsulting.egnyte.com/h-s/20140113/a2bce1eb9fbe4c8e