How to create Software Update Group Deployment

$StartDate = ([System.Management.ManagementDateTimeconverter]::ToDmtfDateTime((Get-Date))).Split(".")[0]
$Deadline = ([System.Management.ManagementDateTimeconverter]::ToDmtfDateTime((Get-Date).AddDays(7))).Split(".")[0]
$Updates = 16787514,16787565,16787577,16787651,16787663

$WMIConnection = [WMICLASS]"\\Localhost\Root\SMS\Site_PS1:SMS_UpdateGroupAssignment"
    $NewSUPDeployment = $WMIConnection.psbase.CreateInstance()
    $NewSUPDeployment.ApplyToSubTargets = $False
    $NewSUPDeployment.AssignedCIs =  $Updates #Software Updates that are in Software Update Group
    $NewSUPDeployment.AssignedUpdateGroup = 16789635 #Software Update Group CI_ID
    $NewSUPDeployment.AssignmentAction = 2
    $NewSUPDeployment.AssignmentName = "SUM 2013 06 June"
    $NewSUPDeployment.AssignmentType = 5
    $NewSUPDeployment.ContainsExpiredUpdates = $False
    $NewSUPDeployment.CreationTime = "$StartDate.000000+***"
    $NewSUPDeployment.DesiredConfigType = 1
    $NewSUPDeployment.DisableMomAlerts = $False
    $NewSUPDeployment.DPLocality = 80
    $NewSUPDeployment.Enabled = $True
    $NewSUPDeployment.EnforcementDeadline = "$Deadline.000000+***"
    $NewSUPDeployment.LimitStateMessageVerbosity = $False
    $NewSUPDeployment.LocaleID = 1033
    $NewSUPDeployment.LogComplianceToWinEvent = $False
    $NewSUPDeployment.NotifyUser = $False
    $NewSUPDeployment.OverrideServiceWindows = $False
    $NewSUPDeployment.PersistOnWriteFilterDevices = $False
    $NewSUPDeployment.RaiseMomAlertsOnFailure = $False
    $NewSUPDeployment.RebootOutsideOfServiceWindows = $False
    $NewSUPDeployment.SendDetailedNonComplianceStatus = $False
    $NewSUPDeployment.StartTime = "$StartDate.000000+***"
    $NewSUPDeployment.StateMessagePriority = 5
    $NewSUPDeployment.StateMessageVerbosity = 1
    $NewSUPDeployment.SuppressReboot = $False
    $NewSUPDeployment.TargetCollectionID = "SMS00001"
    $NewSUPDeployment.UseBranchCache = $True
    $NewSUPDeployment.UseGMTTimes = $False
    $NewSUPDeployment.UserUIExperience = $True
    $NewSUPDeployment.WoLEnabled = $True
    $NewSUPDeployment.SourceSite = "PS1"
    $NewSUPDeployment.Put()