installing change user name hack, little confusing???

Hello, in the instructions it says the following....

Now you will need to create this table for logging of the username and last time they updated.

CREATE TABLE namelogs (userid INT (5) not null , usernames LONGTEXT not null , lastchange INT (12) not null )

Please explain what that means....

[Admin]

Do you have phpMyAdmin installed on your server?
If so, run this query in the special box for queries.
If you want I can make a little file that will do that for you.

Chen

[Admin]

Unzip the attached file, upload installusernamehack.php to your admin folder, and go to it from your web browser.