Create Lists and modify navigation using Powershell

SPSite = New-Object Microsoft.SharePoint.SPSite("http://localhost:1000/sites/demo");

$ParentWeb = $SpSite.OpenWeb();

 

$ChildWebs = $ParentWeb.Webs;

foreach($web in $ChildWebs)

{

      $TemplateType = $web.ListTemplates["Discussion Board"];

      #$web.Lists["Discussion Board"].Delete();

 

      $web.Lists.Add("Discussion Board","Discussion Board",$TemplateType);

      $newList =  $web.Lists["Discussion Board"];

 

      $nodes = $web.Navigation.QuickLaunch;

      foreach($node in $nodes)

      {

            if($node.Title -eq "Lists")

            {

                  $navNode = New-Object Microsoft.SharePoint.Navigation.SPNavigationNode("Discussion Board", $newList.get_DefaultViewUrl(), $true);

                  $node.Children.AddAsLast($navNode);

            }

      }

      $web.Dispose();

}

$ParentWeb.Dispose();

$SPSite.Dispose();