J2t_Ajaxcheckout installation

Question has to do with the well known to the magento community, J2T Ajax cart, which can be found here.

Although the installation seems straightforward, you are assumed to copy the files to appropriate directories and modify from the administrator panel. After a "successful" installation cart's behaviour remains the same. I used the term "successful" since the JavaScript files are loading along with the css.

Are there any additional steps missing from the installation procedure? (note: development magento's version is 开发者_StackOverflow中文版1.4.0.1).

---

Plugin extructure

• frontend/default/default/images/j2t
• frontend/default/default/css/j2t
• frontend/default/default/layout/j2tajaxcheckout.xml
• frontend/default/default/template/j2tajaxcheckout

comented all j2tajaxcheckout.xml and add to catalog.xml

<default>         
 <reference name="before_body_end">
   <block type="core/template" name="j2t_ajax_wrapper" after="-" template="j2tajaxcheckout/ajax_wrapper.phtml" />
 </reference>
</default>

and final file catalog.xml

<!--
AJAX cart modulo
-->

   <j2tajaxcheckout_index_cart>
        <reference name="root">
            <action method="setTemplate"><template>page/1column.phtml</template></action>
        </reference>

        <reference name="content">
          <remove name="head"/>
            <remove name="header"/>
            <remove name="footer"/>
            <remove name="left"/>
            <remove name="right"/>
            <remove name="before_body_end"/>

            <block type="j2tajaxcheckout/cart" name="j2tajaxcheckout" template="j2tajaxcheckout/ajaxcart.phtml">
                <block type="checkout/cart_sidebar" name="cart_sidebar_ajax" as="cart_sidebar_ajax" template="checkout/cart/sidebar.phtml">
                    <action method="addItemRender"><type>simple</type><block>checkout/cart_item_renderer</block><template>checkout/cart/sidebar/default.phtml</template></action>
                    <action method="addItemRender"><type>grouped</type><block>checkout/cart_item_renderer_grouped</block><template>checkout/cart/sidebar/default.phtml</template></action>
                    <action method="addItemRender"><type>configurable</type><block>checkout/cart_item_renderer_configurable</block><template>checkout/cart/sidebar/default.phtml</template></action>
                </block>
            </block>
        </reference> 
    </j2tajaxcheckout_index_cart>