Upload kl_addnewdefaultavatar.php to the /wp-content/plugins/
Activate the plugin through the 'Plugins' menu in WordPress
Go to Settings > Discussion > Avatars
Supply the name and URL for the avatar you'd rather use. Save. (Some themes won't resize your image to fit, so it's best to use an image that's already the right size.)
Your avatar will now be available in the list, select it and save.
Requires: 2.8 or higher Compatible up to: 3.3.2 Last Updated: 2011-12-24 Downloads: 9,196