Bulk Add of Additional Pages

Hi. The plug-in is working great for me, but I need to add a number of dynamic pages on our site which are not standard WordPress pages. I was able to add a couple manually using the ‘Additional Pages’ feature in the XML Sitemaps’ Settings page, but that doesn’t scale. How can I add many custom URLs to the sitemap?

I took a look in the wrd_options table and found an option_name called sm_cpages which had the URLs that I added manually. Would I have to edit that cell directly to automate the bulk addition? The extra formatting in that cell, and the fact that it is only a single cell containing multiple URLs scares me. Please help!

http://wordpress.org/extend/plugins/google-sitemap-generator/