Limit concurrent backups in VDP 5.8

Anyone know how to limit the concurrent backups in VDP 5.8? The registerproxy.sh script no longer does this in VDP 5.8.

Here is all the output that is displayed when the registerproxy.sh script is ran.

Here's the article I was using to try and change the # of proxies.

http://onevirtual.wordpress.com/2013/11/20/re-configure-proxies-for-vdp-to-limit-the-number-of-parallel-backups/