How to send an Operating System Image to Distribution Point

$DistributionPoint = "CM01"
$DomainName = "OOBE.LOCAL"
$SiteCode = "PS1"
$NALPath = "[""Display=\\" +  $DistributionPoint + "." + $DomainName + "\""]MSWNET:[""SMS_SITE=" + $SiteCode + """]\\" + $DistributionPoint + "." + $DomainName + "\"
 
$OSImage = Get-WmiObject -Namespace 'Root\SMS\Site_PS1' -Class 'SMS_ImagePackage' -Filter "Name = 'Windows 8 Enterprise x86'"
$OSImage.AddDistributionPoints($SiteCode,$NALPath)