This plugin is obsolete as of WordPress 2.4.
Replicates the custom column feature of the manage posts page. This is in response to the long-standing enhancement request. It provides a
manage_pages_custom_column action and
manage_pages_columns filter which can be used similarly to the
manage_posts_custom_column action and
manage_posts_columns filter provided by WordPress.
A tutorial on how to add custom columns to the manage posts screen can be viewed on my website.
Free Download: Download this wp-plugin