What should I do with the metadata_hack.sql? Should I upload it or where should i put this one. I'm seriously a new one when it comes to hacks
That .sql file is a set of SQL statements that are meant to create a new table and insert fields into the Joomla database. This hack requires some extra tables be made in the database to manage and store all the metadata. If you're familiar with phpmyadmin (the backend access to your database and all its tables), log into phpmyadmin and open up the database for your Joomla site. (I'm working on my PC using WAMP, so I would access it by typing in the URL
http://localhost/phpmyadmin , if you're working locally it should be the same.)
When it's open, click on the "SQL" tab, and in the white space provided, copy and paste the contents of the .sql file (which you can open in Notepad, it's just a text file at the end of the day) and then click on the "Go" button to execute the statements and create the necessary tables.
If you're not familiar with phpmyadmin, or you use a different system, I suggest you ask for some help inserting the SQL into your database.