oscommerce modify google sitemap contribution

I want to use the google xml sitemap contribution on a few of my websites. At the moment it works with categories, products, information pages, manufacturers and articles. I need this contribution modified so that it also works with topics. There are basically just 2 pages that need some code added so that sitemaps are generated for topics as well. The exact contribution is Google XML Sitemap SEO V 1.5 and it can be found here : [login to view URL] The 2 files that need code added have been uploaded with this project. This will be used on sites that are based on oscommerce MS2.