Locate the answer media by its CIDATA volume label in Autounattend.xml

Shorten the first-logon CommandLine and stop depending on a drive letter.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

seediso/windows11/Autounattend.xml

@@ -162,7 +162,7 @@
         <SynchronousCommand wcm:action="add">
           <Order>1</Order>
           <Description>Configure Windows from the answer-media script</Description>
-          <CommandLine>powershell.exe -NoProfile -ExecutionPolicy Bypass -Command "$script = Get-ChildItem -Path (Get-PSDrive -PSProvider FileSystem).Root -Filter 'Configure-Windows.ps1' -File -ErrorAction SilentlyContinue | Select-Object -First 1; if (-not $script) { throw 'Configure-Windows.ps1 was not found on the attached media.' }; &amp; $script.FullName -InstallVirtIO -EnableAutomaticLogon -DisableAutoUpdate -CopyInstallers -NoPause"</CommandLine>
+          <CommandLine>powershell.exe -NoProfile -ExecutionPolicy Bypass -Command "&amp; ('{0}:\Configure-Windows.ps1' -f (Get-Volume -FileSystemLabel CIDATA).DriveLetter) -InstallVirtIO -EnableAutomaticLogon -DisableAutoUpdate -CopyInstallers -NoPause"</CommandLine>
           <RequiresUserInput>false</RequiresUserInput>
         </SynchronousCommand>
       </FirstLogonCommands>