We'll create fresh WordPress site with Default Thumbnail Plus installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Automatically display a default Post Thumbnail image, either the first image attached to a post, or set default images for specific categories, tags, or custom taxonomies. Supports custom fields to ease upgrading.
Includes the SLT File Select plugin created by gyrus (http://www.babyloniantimes.co.uk/index.php?page=donate)
See documentation at http://www.pjgalbraith.com/2011/12/default-thumbnail-plus/