Я менял, вот-
<modification>
<id>Free fast order</id>
<version>1.0</version>
<vqmver>2.1.6</vqmver>
<author>RGB</author>
<file name="catalog/view/theme/default/template/common/header.tpl">
<operation>
<search position="after">
<![CDATA[
<script type="text/javascript" src="catalog/view/javascript/common.js"></script>
]]>
</search>
<add>
<![CDATA[
<script type="text/javascript" src="catalog/view/javascript/fast_order.js"></script>
]]>
</add>
</operation>
<operation>
<search position="after">
<![CDATA[
<link rel="stylesheet" type="text/css" href="catalog/view/theme/default/stylesheet/stylesheet.css" />
]]>
</search>
<add>
<![CDATA[
<link rel="stylesheet" type="text/css" href="catalog/view/theme/default/stylesheet/fast_order.css" />
]]>
</add>
</operation>
</file>
<file name="catalog/view/theme/default/template/product/product.tpl">
<operation>
<search position="after">
<![CDATA[
<input type="button" value="<?php echo $button_cart; ?>" id="button-cart" class="button" />
]]>
</search>
<add>
<![CDATA[
<a id="fast_order" class="button" />Быстрый заказ</a>
<div style="display:none">
<div id="fast_order_form">
<input id="product_name" type="hidden" value="<?php echo $heading_title; ?>">
<input id="product_price" type="hidden" value="<?php echo ($special ? $special : $price); ?>">
<div class="fast_order_center"><?php echo $heading_title; ?> — ваш заказ</div>
<div class="fast_order_left">
<p>Имя:</p>
<p>Телефон:</p>
<p>Комментарий:</p>
</div>
<div class="fast_order_right">
<p><input type="text" id="customer_name"/></p>
<p><input type="text" id="customer_phone"/></p>
<p><input type="text" id="customer_message"/></p>
</div>
<div class="fast_order_center">
<p id="fast_order_result">Пожалуйста, укажите ваше имя и телефон, чтобы мы могли связаться с вами</p> <div <div id="fast_go"><button class="fast_order_button"><span>Оформить заказ</span></button></div>
</div>
</div>
</div>
]]>
</add>
</operation>
</file>
</modification>