How to: Add the Filter Web Part to the default view of all lists

#open the web
$web = Get-SPWeb http://yoursite
 
#load the required assemblies
$fwpAssembly = [System.Reflection.Assembly]::LoadWithPartialName("sapiens.at.SharePoint.FilterWebPart")
$frameworkAssembly = [System.Reflection.Assembly]::LoadWithPartialName("sapiens.at.SharePoint")
 
ForEach($l in $web.Lists){
    try{
        #open the web part manager of the default view
        $wpm = $web.GetLimitedWebPartManager($l.DefaultView.ServerRelativeUrl, [System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared);
 
        #check if there is a XsltListViewWebPart on the view page and no FilterWebPart
        $lvwps = $wpm.WebParts | where { $_.GetType().FullName -eq "Microsoft.SharePoint.WebPartPages.XsltListViewWebPart" }
        $fwps = $wpm.WebParts | where { $_.GetType().FullName -eq "sapiens.at.SharePoint.FilterWebPart.FilterWebPart" }
        if($lvwps.Count -eq 1 -and $fwps.Count -eq 0){
            #new FilterWebPart
            $fwp = New-Object sapiens.at.SharePoint.FilterWebPart.FilterWebPart
            #connect with ListViewWebPart
            $fwp.ConnectedWebPartId = $lvwps[0].StorageKey.ToString();
            #configure the search fields (all list fields that can be used in the filter web part)
            $fwp.SearchFieldsString = (($l.Fields | where { try{ [Sapiens.at.SharePoint.FilterFields.FilterField]::IsFieldSearchable($_) }catch { } } | foreach {$_.InternalName}) -join ';#');
            #complete configuration
            $fwp.IsConfigured=$true;
            #Add the filter web part to the view page
            $newWP = $wpm.AddWebPart($fwp, "Main", 0);
            write-host ("Web part added to " + $l.DefaultViewUrl)
        }
    }
    catch [exception]
    {
        write-host ("An error occurred when adding web part to " + $l.DefaultViewUrl + ": " + $_.Exception.Message)
    }
}