BULLET Reaplace and navigation front size!

I want reaplace that "BULLET" image to my own costum image.
My costum image located here "/infusions/sh_css_navigation_panel/images/bull.png" what i want use!

Code is here:
[syntaxhighlighter brush=php,first-line=1,highlight=0,collapse=false,html-script=false]<?php
/*-------------------------------------------------------+
| PHPFusion Content Management System
| Copyright (C) 2002 - 2011 Nick Jones
| http://www.php-fusion.co.uk/
+--------------------------------------------------------+
| SH CSS Navigation Panel v3.0 for PHPFusion v7.02.01
| Copyright © 2008-2011 Stephan Hansson (StarglowOne)
| http://www.starglowone.eu/
+--------------------------------------------------------+
| Filename: sh_css_navigation_panel.php
| Author: Stephan Hansson (StarglowOne)
| Original Author: Nick Jones (Digitanium)
+--------------------------------------------------------+
| This program is released as free software under the
| Affero GPL license. You can redistribute it and/or
| modify it under the terms of this license which you
| can read by viewing the included agpl.txt or online
| at www.gnu.org/licenses/agpl.html. Removal of this
| copyright header is strictly prohibited without
| written permission from the original author(s).
+--------------------------------------------------------*/

if (!defined("IN_FUSION")) { die("Access Denied"); }

echo "<script type='text/javascript' src='".INCLUDES."jquery/jquery-ui.js'></script>\n";
echo "<script type='text/javascript' src='".INCLUDES."jquery/jquery.cookies.js'></script>\n";
echo '<script type="text/javascript">
$( function() {
var cookieName = "'.COOKIE_PREFIX.'css_nav";

$( "#navigation" ).accordion( {
autoHeight: false,
active: ( $.cookies.get( cookieName ) || 0 ),
change: function( e, ui ) { $.cookies.set( cookieName, $( this ).find( "h2" ).index ( ui.newHeader[0] ) ); }
} );
} );
</script> ';

$list_open = false;

openside($locale['global_001']);
$result = dbquery("SELECT link_name, link_url, link_window, link_visibility FROM ".DB_SITE_LINKS." WHERE link_position='1' OR link_position='2' ORDER BY link_order");
if (dbrows($result)) {
$i = 0;
echo "<div id='navigation'>\n";
while($data = dbarray($result)) {
$li_class = ""; $i++;
if (checkgroup($data['link_visibility'])) {
if ($data['link_name'] != "---" && $data['link_url'] == "---") {
if ($list_open) { echo "</ul>\n"; $list_open = false; }
$imagename = strtolower(str_replace(" ","_",$data['link_name']));
if (file_exists(INFUSIONS."sh_css_navigation_panel/images/".$imagename.".png")) {
$nav_img = "<img src='".INFUSIONS."sh_css_navigation_panel/images/".$imagename.".png' border='0' alt='".$data['link_name']."' />&nbsp;\n";
} else {
$nav_img = "";
}
echo "<h2>".$nav_img.parseubb($data['link_name'], "b|i|u|color|img")."</h2>\n";
} else if ($data['link_name'] == "---" && $data['link_url'] == "---") {
if ($list_open) { echo "</ul>\n"; $list_open = false; }
echo "";
} else {
if (!$list_open) { echo "<ul>\n"; $list_open = true; }
$link_target = ($data['link_window'] == "1" ? " target='_blank'" : "");
if ($i == 1) { $li_class = "first-link"; }
if (START_PAGE == $data['link_url']) { $li_class .= ($li_class ? " " : "")."current-link"; }
if (preg_match("!^(ht|f)tp(s)?://!i", $data['link_url'])) {
echo "<li".($li_class ? " class='".$li_class."'" : "").">\n";
echo "<a href='".$data['link_url']."'".$link_target." class='side'>".THEME_BULLET."\n";
echo "<span>".parseubb($data['link_name'], "b|i|u|color|img")."</span></a></li>\n";
} else {
echo "<li".($li_class ? " class='".$li_class."'" : "").">\n";
echo "<a href='".BASEDIR.$data['link_url']."'".$link_target." class='side'>".THEME_BULLET."\n";
echo "<span>".parseubb($data['link_name'], "b|i|u|color|img")."</span></a></li>\n";
}
}
}
}
if ($list_open) { echo "</ul>\n"; }
echo "</div>\n";
} else {
echo $locale['global_002'];
}
closeside();
?>[/syntaxhighlighter]

[size=16]And Second question:[/size]

How can change that text size,

when i using bb code it not work and image lost!