Something

global $vbulletin;
if (is_array($vbulletin->forumcache))
{
	foreach ($vbulletin->forumcache AS $forum)
	{
		$totalthreads += $forum['threadcount'];
		$totalposts += $forum['replycount'];
	}
}
$totalthreads = vb_number_format($totalthreads);
$totalposts = vb_number_format($totalposts);

$numbermembers = vb_number_format($vbulletin->userstats['numbermembers']);
$newusername = $vbulletin->userstats['newusername'];
$activemembers = vb_number_format($vbulletin->userstats['activemembers']);