Customize sub cat order & display description

I’d like to display sub categories and their description. So far I have been using the code below:

<?php
$categories = get_categories("title_li=&orderby=id&hide_empty=0&child_of=1");
foreach ((array) $categories as $cat) {
?>
<h2><a href="<?php echo get_category_link($cat->cat_ID); ?>" title="View all posts in <?php echo $cat->cat_name; ?>"><?echo $cat->cat_name; ?></a></h2>
<p><?php echo $cat->category_description; ?></p>
<?php } // end foreach loop ?>

I recently installed the My Category Order plugin and in their documentation it asks you to use:

wp_list_categories('orderby=order&optioncount=1&hierarchical=0&title_li=<h2>Categories</h2>');

I’d love some help to integrate the code above with the plugin call.

Thanks in advance.