Also if you want your top posters for the calendar month you need to do the following:
Find:
$tString = str_replace("<<NUMPOSTERS>>",$topposters,$pal_TopPosters[0]);
Below it add
$tString .= " (";
$tString .= date("F");
$tString .= ")";
and change the query to:
$FirstOfMonth = mktime(0,0,0, date("m"),1,date("Y"));
$LastOfMonth = mktime(0,0,0, date("m")+1,1,date("Y")) - 86400;
$strWhere = "AND B_Posted BETWEEN '$FirstOfMonth' AND '$LastOfMonth' ";
$query = "
SELECT U_Username,
COUNT( B_Number ) AS TotalPosts,
U_Number
FROM w3t_Users,
w3t_Posts
WHERE U_Number > 1
AND U_Number = B_PosterId
$strWhere
GROUP BY U_Username
ORDER BY TotalPosts DESC
$limit
";
This should give you the top posters of the calendar month. With a small adaptation of the SQL query to Josh's pal box you can set this up.