How to enable sig images

[StarGirl]

You know in your site settings, there's an option to turn on " Enable Alternate Friendly Signature BBCode". It says I need to change the .htaccess file to something that will make it work. So what exactly do I change in there? I see the file, I see the part that converts the links..

Also, I've tried to get user's avatars to show up on the profile.php page. I got it, but now users are shown twice, one after the other and I think some are mixed up. Can you help? [I have no programming experience, I simply copied the query and edited it]

	// We did not specify a user, so show the memberlist
	$article_title = "Memberlist";
	$article_content = "Here are all of the members of this site, sorted by registration date.<br /><br />";
    include("classes/class_pagination.php");
    include("css/pagination.css");
	$query = "SELECT * FROM {$prefix}users ORDER BY uid ASC";
	$stmt = $adopts->query($query);
	$rowsperpage = 15;
    $pagination = new Pagination($adopts, $query, $rowsperpage, "http://www.{$domain}{$scriptpath}/profile.php");
    $pagination->setPage($_GET[page]);

	$query = "SELECT * FROM {$prefix}users ORDER BY uid ASC LIMIT {$pagination->getLimit()},{$rowsperpage}";  
	$stmt = $adopts->query($query);

	while ($row = $stmt->fetchObject()){
		$status = cancp($row->usergroup);
        $star = ($status == "yes")?"<img src='icons/star-rating-full.png' border=0' width='15' length='15' /> ":"";
        
        $getavatar = "SELECT * FROM {$prefix}users_profile ORDER BY uid ASC LIMIT {$pagination->getLimit()},{$rowsperpage}";  
	$stmt2 = $adopts->query($getavatar);

	while ($avatarrow = $stmt2->fetchObject()){
		$article_content .= "<strong><a href='profile.php?user={$row->username}'>{$star}<img src='{$avatarrow->avatar}' width='25' length='25'>{$row->username}</a></strong><br />";
        }
	}

	$article_content .= "<br />{$pagination->showPage()}";

}