I think this will do exactly what you are looking for. Save your original showthread.php because I am very new to PHP. But it seems to work fine on my test board.
In showthread.php find :
PHP Code:
$post[joindate]=vbdate($registereddateformat,$post[joindate]);
Right above that add :
PHP Code:
$RankNum = $post[posts];
if ($RankNum > 1000) {
$rank = "<img src=\"images/ranks/1000.gif\" border=0>";
}
elseif (($RankNum > 500) && ($RankNum < 999)) {
$rank = "<img src=\"images/ranks/500.gif\" border=0>";
}
elseif (($RankNum > 100) && ($RankNum < 499)) {
$rank = "<img src=\"images/ranks/100.gif\" border=0>";
}
elseif (($RankNum > 50) && ($RankNum < 99)) {
$rank = "<img src=\"images/ranks/50.gif\" border=0>";
}
elseif (($RankNum > 10) && ($RankNum < 49)) {
$rank = "<img src=\"images/ranks/10.gif\" border=0>";
}
elseif (($RankNum > 5) && ($RankNum < 9)) {
$rank = "<img src=\"images/ranks/5.gif\" border=0>";
}
else {
$rank = "<br>";
}
Upload the images in images/ranks/ of your forum directory and add $rank in the postbit template where you want the image to appear.
You mentioned you have 11 user titles so you will need to add more elseif routines and change the number of posts in this example to fit your forum title settings.