WordPress.org

Installation Instructions:

1. Download the plugin and unzip it (didn't you already do this?).
2. Put the 'search-everything' directory into your wp-content/plugins/ directory.
3. Go to the Plugins page in your WordPress Administration area and click 'Activate' next to Search Everything.
4. Go to the Options > Search Everything and configure your settings.
5. That's it. Have fun and if you can contribute (see notes).