Private/Win/Set-UnattendedWindowsComputerName.ps1

function Set-UnattendedWindowsComputerName
{
    param (
        [Parameter(Mandatory = $true)]
        [string]$ComputerName
    )
    $component = $script:un |
    Select-Xml -XPath '//un:settings[@pass = "specialize"]/un:component[@name = "Microsoft-Windows-Shell-Setup"]' -Namespace $ns |
    Select-Object -ExpandProperty Node

    $component.ComputerName = $ComputerName
}