[Plugin: WP Realtime Sitemap] Custom Post Type Taxonomies in sitemap

Hello,

I would love to show all my custom post types in sitemap, but grouped in taxonomies.

The plugin seems to detect custom post types, because in

wp-admin/options-general.php?page=wp-realtime-sitemap.php

I can read this: wp-realtime-sitemap-portfolio *custom post type*

But is possible to detect also taxonomies, and show them in sitemap?

Thank you!!

http://wordpress.org/extend/plugins/wp-realtime-sitemap/