Using Powershell, how are dropdown based custom webpart properties set?

[littleGreenDude]

I have the following Powershell function:

function Add-WebPartToPage {

\[CmdletBinding()\]

Param(

   \[Parameter(Mandatory=$true, Position=0, ValueFromPipeline=$true)\]

   \[System.Object\]$web,

   \[Parameter(Mandatory=$true, Position=1)\]

   \[string\]$pageTitle,

   \[Parameter(Mandatory=$true, Position=2)\]

   \[Microsoft.SharePoint.SPList\]$list,       

   \[Parameter(Mandatory=$false, Position=3)\]

   \[System.Object\]$webpart,

   \[Parameter(Mandatory=$false, Position=4)\]
   
   \[string\]$webPartTitle,

   \[Parameter(Mandatory=$false, Position=5)\]
   
   \[string\]$panelTitle,

   \[Parameter(Mandatory=$false, Position=6)\]
   
   \[int\]$CSPUElevel,

   \[Parameter(Mandatory=$false, Position=7)\]
   
   \[int\]$panelType

)

Process

{

    #if webpart specified then add it to the page
    if($webpart)
    {
        $pageName = $list.Title + "/$pageTitle.aspx"
		$pageName = $pageName -replace " ",""
        $page = $web.GetFile($pageName)
        $page.CheckOut()
        $mgr = $web.GetLimitedWebPartManager($pageName, \[System.Web.UI.WebControls.WebParts.PersonalizationScope\]::Shared)
          
		if($webPartTitle)
		{
			$webpart.Title = $webPartTitle
		}
        $webpart.ChromeType = "None"
		#++ Extended Settings
        if($webpart.GetType().Name -eq "DynamicWebPart")
        {
        # 
            $pinProperties = $webpart.GetType().GetProperties()
            foreach ($prop in $pinProperties)
            {
			    if(($panelTitle) -and ($prop.Name -eq "PanelTitle"))
			    {   
                    $webpart.PanelTitle = $panelTitle
			    }
			    if(($CSPUElevel) -and ($prop.Name -eq "CSPUElevel"))
			    {
                    $webpart.CSPUElevel = $CSPUElevel
			    }
			    if(($panelType) -and ($prop.Name -eq "PanelType"))
			    {
				    $webpart.PanelType = $panelType
			    }
            }
        }
		#-- End of Extended Settings
        $mgr.AddWebPart($webpart, "FullPage", 0)
        Write-Host -f Green "Webpart $webpart.WebBrowsableObject added to the page"
        
        $page.CheckIn("Checked in Automatically")
        #$page.Publish("Published Automatically")
    }

}

}

Everything works fine until it gets to the extended properties of the webpart. Within that logic, the panel title will set correc

[Beginner Luck]

yes you can