Windows Server 2003 – How to control sleep settings through GPO

If I'm not mistaken, those settings are only applicable to W2KSP1, WinXP, and W2K3 computers. You need to enable the "Prohibit access to the properties of a LAN connection" setting, which should prohibit access to any properties of a LAN connection in Windows Vista and Windows 7.

You're close. Under Folder Options, Right Click in the main part of the area and go to New -> File Type

Action: Create
File extension: .ps1
Check Configure Class Settings
Under Action -> New
Action: Open
Application: *Path to Powershell*

Then OK/Save out.

Reference: TechNet: Configure a File Type Item

EDIT: Can't find the class, and I even used PowerShell to extract that dropdown list and search it...nothing.

There is a way to set it via Registry in Group Policy. The class is Microsoft.PowerShellScript.1 and full path to it is:

HKEY_CLASSES_ROOT\Microsoft.PowerShellScript.1\Shell\Open\Command

Change the (Default) value to:

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "-file" "%1"

This is found in the GPOE:

\Computer Configuration\Preferences\Windows Settings\Registry

SUMMARY: Create a new Registry Item:

Settings:
  Action: Update
  Hive: HKEY_CLASSES_ROOT
  Key Path: Microsoft.PowerShellScript.1\Shell\Open\Command
  Value name: Check Default
  Value type: REG_SZ
  Value data: "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "-file" "%1"

Then wait for GP flush on machines.