Look for the free E-Book “A Layman’s guide to PowerShell Remoting” http://www.ravichaganti.com/blog/?page_id=1301 I believe page 43 or 34 I’m dyslexic.
Anyway it goes on to tell you how to use the winrm command line syntax to manually add a list of hosts that are allowed to remote. This PDF file was the most helpful to me for figuring out how to do it, and it does work. However I need to get around to figuring out how to add a CIDR noted IP range to it.
-VERN