This all has to do with a custom post type, not posts or pages.
I've built an online store using WordPress and custom post types. I have a custom field "sold" that can have a value of "TRUE" or "FALSE". I want to set the sitemap priority of the "TRUE" (sold) items to 0.1 while keeping the existing items at 0.8.
How can I do this?
http://wordpress.org/extend/plugins/google-sitemap-generator/