[void] [System.Reflection.Assembly]::Load("Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c") | out-null
[void] [System.Reflection.Assembly]::Load("Microsoft.Office.Server, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c") | out-null
[void] [System.Reflection.Assembly]::Load("Microsoft.Office.Server.Search, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c") | out-null

$serverContext = [Microsoft.Office.Server.ServerContext]::Default
$context =  [Microsoft.Office.Server.Search.Administration.SearchContext]::GetContext($serverContext) 

$sspcontent = new-object Microsoft.Office.Server.Search.Administration.Content($context) 
$sspContentSources =  $sspcontent.ContentSources 

foreach ($cs in $sspContentSources) 
{ 
  if ($cs.Name -eq "Local Office SharePoint Server sites")
  {
    Write-Host "NAME: ", $cs.Name, " - ", $cs.CrawlStatus
    if ($cs.CrawlStatus -eq [Microsoft.Office.Server.Search.Administration.CrawlStatus]::Idle)
    {
      Write-Host "Starting Incremental crawl"
      $cs.StartIncrementalCrawl();
    }
    else
    {
      Write-Host "Crawl running"
    }
  }
}