Mudar CSS de um site

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE install PUBLIC "-//Joomla! 1.7//DTD template 1.0//EN" " www.joomla.org/xml/dtd/1.7/template-install.dtd"> ;
<install version="2.5" type="template" method="upgrade">
<name>BrusqueNews</name>
<creationDate>2012-02-26</creationDate>
<author>André Specker</author>
<copyright>Copyright © BrusqueNews <!-- w -->[url=http://www.BrusqueNews.com.br" onclick="window.open(this.href);return false;]www.BrusqueNews.com.br[/url]<!-- w --></copyright>
<authorEmail>
<script language="JavaScript" type="text/javascript">
<!--
var prefix = 'm&#97;&#105;lt&#111;:';
var suffix = '';
var attribs = '';
var path = 'hr' + 'ef' + '=';
var addy98374 = 'c&#111;nt&#97;t&#111;' + '&#64;';
addy98374 = addy98374 + 'jC&#117;rs&#111;s' + '&#46;' + 'c&#111;m' + '&#46;' + 'br';
document.write( '<a ' + path + '\'' + prefix + addy98374 + suffix + '\'' + attribs + '>' );
document.write( addy98374 );
document.write( '<\/a>' );
//-->
</script><a href="mailto:specker09@gmail.com">specker09@gmail.com</a><script language="JavaScript" type="text/javascript">
<!--
document.write( '<span style=\'display: none;\'>' );
//-->
</script><span style="display: none;">CLOAKING
<script language="JavaScript" type="text/javascript">
<!--
document.write( '</' );
document.write( 'span>' );
//-->
</script></span></authorEmail>
<authorUrl>http://www.brusquenews.com.br</authorUrl>
<version>1.0.0</version>
<description><![CDATA[
<h1>BrusqueNews</h1>
<p><img src="/../templates/BrusqueNews/template_preview.png" /></p>
<h2>Posições do módulo:</h2>
<ol>
<li>topo</li>
<li>artigo-topo</li>
<li>artigo-baixo</li>
<li>rodape</li>
<li>debug</li>
<li>data</li>
<li>login</li>
<li>logo</li>
<li>busca</li>
<li>menu</li>
<li>menu2</li>
<li>breadcrumb</li>
<li>slide</li>
<li>direita</li>
<li>slide2</li>
<li>direita2</li>
<li>esquerda</li>
<li>direita2</li>
<li>footer</li>
<li>debug</li>
<li>user1</li>
<li>user2</li>
<li>user3</li>
<li>user4</li>
</ol>
<p>Criado por <a href="http://www.brusquenews.com.br" target="_blank">André Specker | <!-- w -->[url=http://www.BrusqueNews.com.br" onclick="window.open(this.href);return false;]www.BrusqueNews.com.br[/url]<!-- w --></a>.</p>
]]></description>

<files>
<folder>css</folder>
<folder>html</folder>
<folder>images</folder>
<folder>js</folder>
<filename>apple-touch-icon-57x57.png</filename>
<filename>apple-touch-icon-72x72.png</filename>
<filename>apple-touch-icon-114x114.png</filename>
<filename>component.php</filename>
<filename>error.php</filename>
<filename>favicon.ico</filename>
<filename>index.php</filename>
<filename>offline.php</filename>
<filename>template_preview.png</filename>
<filename>template_thumbnail.png</filename>
<filename>templateDetails.xml</filename>
</files>

<languages folder="languages">
</languages>

<positions>
<position>data</position>
<position>login</position>
<position>logo</position>
<position>busca</position>
<position>menu</position>
<position>menu2</position>
<position>breadcrumb</position>
<position>slide</position>
<position>direita</position>
<position>slide2</position>
<position>direita2</position>
<position>esquerda</position>
<position>direita2</position>
<position>footer</position>
<position>debug</position>
<position>user1</position>
<position>user2</position>
<position>user3</position>
<position>user4</position>
</positions>

<config>
<fields name="params">
<fieldset name="advanced">
<field name="FIELD_SPACER_HEADER_DESC" type="spacer" hr="false" />
</fieldset>
</fields>
</config>
</install>

O nome da pasta que você criou é igual a esse nome:

Caso melhor, envie o template para meu email: <!-- e --><a href="mailto:edyonil@gmail.com]edyonil@gmail.com[/url]<!-- e -->

Conseguiu ver o que tem de Errado @edyonil; ?