How to use powershell.exe with -Command using a scriptblock and parameters

Question

For reasons that should not impact the current question I need to run a script, with the definition and parameters outside the command, inside a different PowerShell instance, w

Answer 1

This answer isn't 100% relevant to the original poster, because they are trying to run PowerShell from within PowerShell. I am trying to run it PowerShell from either a command prompt, or specifically WMI. A little background: the reason I'm trying to do this is because PowerShell remoting is not enabled on my target machine and I want to enable it. I can't use winrm because it requires user input. So, this works:

$x=Get-WmiObject -ComputerName "" -Namespace "root\cimv2" -Class "Win32_Process" -List
$x.Create('C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -Command "& C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -Command {Enable-PSRemoting}"',$null,$null)

Results:

__GENUS          : 2
__CLASS          : __PARAMETERS
__SUPERCLASS     : 
__DYNASTY        : __PARAMETERS
__RELPATH        : 
__PROPERTY_COUNT : 2
__DERIVATION     : {}
__SERVER         : 
__NAMESPACE      : 
__PATH           : 
ProcessId        : 12508
ReturnValue      : 0
PSComputerName   : 

I should probably post this in a different question, but this one came up on a google search for "how to pass scriptblock to powershell.exe", so I thought it would be useful here.