This plugin allows you to display comments and comment form anywhere in WordPress. The comments list can be displayed for WordPress pages and posts without modifying the code and it works with most of the available themes. Just install and activate this plugin and use [sp_comments_block] shortcode anywhere in WordPress to display comments list and comment form.
Read more about this plugin on WordPress blog.
Te puedes descargar este plugin para utilizarlo en tu instalación autoalojada de WordPress.