Can I add custom meta for each image uploaded via media-upload.php?
Yes, you can add fields, an example function rt_image_attachment_fields_to_save($post, $attachment) { // $attachment part of the form $_POST ($_POST[attachments][postID]) // $post[‘post_type’] == ‘attachment’ if( isset($attachment[‘rt-image-link’]) ){ // update_post_meta(postID, meta_key, meta_value); update_post_meta($post[‘ID’], ‘_rt-image-link’, $attachment[‘rt-image-link’]); } return $post; } // now attach our function to the hook. add_filter(“attachment_fields_to_save”, “rt_image_attachment_fields_to_save”, null , 2); see more on this post