That’s a very old tutorial.
Since version 2.9, WP comes with post thumbnails built in:
http://markjaquith.wordpress.com/2009/12/23/new-in-wordpress-2-9-post-thumbnail-images/
That’s a very old tutorial.
Since version 2.9, WP comes with post thumbnails built in:
http://markjaquith.wordpress.com/2009/12/23/new-in-wordpress-2-9-post-thumbnail-images/