WordPress 2 SEO Plugin
You can grab the plugin here.
To use this plugin, you must have Ultimate Tag Warrior installed and activated. I build the SEO plugin using UTW 3, earlier versions may work, but I cannot say for sure it will.
Upload the one page plugin to your plugins folder and activate it within WordPress.
You will need to edit the template header file found in your current templates folder. For standard themes, find the line on your header.php file that contains the title tag element and replace whatever content between the title tags with Seo_Title().