Homepage: http://www.yireo.com/software/magento-extensions/newrelic
Steps to get it working:
- Make sure to install New Relic on your server first
- Make sure to have New Relics PHP-module installed and active
- Upload the files in the source/ folder to your site
- Flush the Magento cache
- Configure settings under System > Configuration > Advanced > New Relic
- Done