Don't undertstand your concern.. You need to install the Google XML Sitemaps plugin for WordPress.. Otherwise you'll have no other way to generate a sitemap for your blog. The short answer to your original question is no.. You can't use this Zen cart module as is to generate a sitemap for both your store and your blog. You could always have the code customized for that purpose, but it's likely you will need to seek out commercial options for this kind of customization..