In your bbcode_quote template, replace all with this:
Demo: http://www.freakwarez.net/post7.fw
PHP:
<style>
.quotetop{
background: #E4EAF2 url(http://i40.tinypic.com/f9qoh5.jpg) no-repeat right;
border: 1px dotted #000;
border-bottom: 0;
border-left: 4px solid #8394B2;
color: #000;
font-weight: bold;
font-size: 10px;
margin: 2px auto 0 auto;
padding: 3px;
}
.quotemain{
background: #FAFCFE;
border: 1px dotted #000;
border-left: 4px solid #8394B2;
border-top: 0;
color: #465584;
padding: 4px;
margin: 0 auto 0 auto;
}
</style>
<div style="width:100%">
<if condition="$show['username']">
<div class="quotetop">
$vbphrase[quote]: <phrase 1="$username">$vbphrase[originally_posted_by_x]</phrase>
<if condition="$postid"><a href="showthread.php?$session[sessionurl]p=$postid#post$postid" rel="nofollow"><img class="inlineimg" src="$stylevar[imgdir_button]/viewpost.gif" border="0" alt="$vbphrase[view_post]" /></a></if>
</div>
<div style="font-style:italic" class="quotemain">$message</div>
<else />
<div class="smallfont quotetop">$vbphrase[quote]:</div>
<div class="quotemain">$message</div>
</if>
</div>
</div>
Demo: http://www.freakwarez.net/post7.fw