1. The template is contained in a rar file (winrar), ensure you have extracted the XML template.
2. Log in to your Blogger dashboard and go to Template
3. Ensure you back up your old template in case you decide to use it again. To do this, click on the Backup / Restore -> "download full template" link and save the file to your hard drive.
4. Click Edit HTML -> Expand Widget Templates
5. Open Facebook Blogger Template with notepad. Copy and replace
6. Don't forget to edit meta content