Right I am having to work on memory here so bear with me if I get some of the details incorrect. If you read through the link I sent you there should be instructions at some point on how to install the database and how to use it. Just keep reading through the entire post until you find some instructions as I remember reading some. If my memory serves me well then you save the database file in the 'database' folder (or something similar) in your Football manager folder in Local Disc C or something. It is where all the folders like 'My Documents', 'My Pictures' etc are. Sorry my instructions are very vague and a bit confusing but read through the post I linked you to and you should be fine.
Also 'StuW' is the creator of the database.