Restoring site or list from a full farm backup

This post covers a scenario, when a user makes some irreversible changes and the only place where the undamaged data is, is the farm full backup. The scenarios can be list deletion, site deletion, permissions damage etc.
So here are the instructions:

1. Locate the folder where your farm full backup is and open the file spbackup.xml
2. Find the content database name in the file and in the found node  locate a line that looks like this:

   <SPParameter Key="SHAREPOINT2010:WSS_Content.dat"><![CDATA[00000055.bak]]></SPParameter>
   

3. 00000055.bak is the name of the database backup of the content database.
4. Go to SQL Management Studio and create a new database.
5. Perform a restore into this database from the backup file mentioned above. You have to change the name of the ldf and mdf file and check the “overwrite the existing database” checkbox.
6. Now open the Central administration. Click “Backup and Restore” tab and then “Recover data from an unattached content database” link.
7. Type in the name of the currently restored database and click Next.
8. Navigate to a list / site collection that you want to restore and click Next.
9. On the following page type in where you want to store the exported data of the list / site collection and click Next.
10. When the backup is created use the Import-SPWeb command to restore the data. The command should look like this:

Import-SPWeb -Path C:\temp\backup.bak -Identity http://localhost