Feature Request: Adding custom variables

I add the following code below to my Piwik tracking code manually in header.php

<?php
        $category = get_the_category();
        if (!is_front_page() && !empty($category[1])) {
            echo '  _paq.push(["setCustomVariable", 1, "Category", "'.$category[1]->cat_name.'", "page"]);
        ';
            echo '  _paq.push(["setCustomVariable", 2, "Sub-Category", "'.$category[0]->cat_name.'", "page"]);
        ';}
        elseif (!is_front_page() && !empty($category[0])) {
            echo '  _paq.push(["setCustomVariable", 1, "Category", "'.$category[0]->cat_name.'", "page"]);
        ';}
        if (is_404()) {
                echo '_paq.push([\'setDocumentTitle\', \'404/URL = \'+String(document.location.pathname+document.location.search).replace(/\//g,"%2f") + \'/From = \' + String(document.referrer).replace(/\//g,"%2f")]);';
        }
        ?>

Basically if I’m on a post it adds the Category as CustomVariable 1 and adds a sub category as customvariable 2 if it exists. It also tracks 404’s (Which wp-piwik can already do)

What I’d like to see is this other functionality built into wp-piwik if possible, so I can track my custom variables.

Sorry if I’m posting in the wrong section!

http://ww.wp.xz.cn/plugins/wp-piwik/