First, download the plugin. Unzip the file, and place the entire wp-admin-tiger folder into the /wp-content/plugins directory. For clarification, the plugin file ‘wp-admin-tiger.php’ and plugin file directory ‘wp-admin-tiger-files’ should be located in the /wp-content/plugins/wp-admin-tiger/ folder. After the files are in place, browse to the Plugins page in your WordPress Administration area, and activate the plugin. The administration design should immediately change. To revert back to the original design, just deactivate the plugin. No core files are (nor should be) modified to install this plugin.