[Mr-Moo]

I cannot help but feel this should have been included in your other thread:
https://vborg.vbsupport.ru/showthread.php?t=207005.

I will review this and see what I can come up for you.

// Edit //

Have you attempted the following:

Find:

PHP Code:

$totalthreads = 0;
$totalposts = 0;
if (is_array($vbulletin->forumcache))
{
    foreach ($vbulletin->forumcache AS $forum)
    {
        $totalthreads += $forum['threadcount'];
        $totalposts += $forum['replycount'];
    }
}
$totalthreads = vb_number_format($totalthreads);
$totalposts = vb_number_format($totalposts); 


Replace with:

PHP Code:

$counter = $db->query_first("SELECT COUNT(postid) AS posts, COUNT(threadid) AS threads FROM " . TABLE_PREFIX . "post");  
$totalposts=number_format($counter['posts']);   
$countthreads = $db->query_first("SELECT COUNT(*) AS threads FROM " . TABLE_PREFIX . "thread");  
$totalthreads=number_format($countthreads['threads']);