This is a pretty easy fix - it did take me some digging to figure it out.. I still need to roll it into my scripts in SCVMM that configure my farm. This needs to be run on every REMOTE server against which the PowerShell Scripts run. The uses the WSMan provider to enable CredSSP on the server. You may have to enable it on the client (from where you run the SPAutoInstaller.bat).. When you pass this hurdle, you will either have to enable remote execution of the powershell scripts or Sign them ( all of them) with a domain key (from your CA) or use a self signed cert and install it on all the remote server.. Go ahead, bite the bullet and stand up a CA and the CRL - you'll be glad you did.. I'll follow up with a blog post on how to modify the templates, publish them, and make them available via the Certificates.mmc.
YMMV..
PS C:> cd wsman:
PS WSMan:> cd .\localhost
PS WSMan:\localhost> Enable-WSManCredSSP Server
YMMV..
PS C:> cd wsman:
PS WSMan:> cd .\localhost
PS WSMan:\localhost> Enable-WSManCredSSP Server