Well, what I did (these are the steps that are in the readme) are:

1. Extract this package into the root of your website! It will
create a directory called echelon and a dir called sql.

2. Create a MySQL database called echelon and a user (echelon)
with a password (echelonb3) that has access from localhost (if
your mysql is running on the same machine as your webserver) to
this database. (Don't forget to flush the privileges)

3. Execute the echelon.sql script inside the directory 'sql' on
the echelon database. This will create two tables and a few
records.

4. Open 'Connections/inc_config.php' with your teksteditor and
make sure the username and password for the b3 database(s) are set
correctly.
MultiDB support requires some handywork... editing inc_config.php
correctly is very important. This config supplies you with a sample
for 3 db's.

5. If your game has PunkBuster support, Echelon has the ability to
write to the pbbans.dat file for instant banning and unbanning of
clients. This info can be set per server in b3connect.php.

6. ONLY IF YOU HAVE CHOSEN A DIFFERENT USERNAME AND/OR PASS UNDER
POINT 2.: Open wwwvalidate.php with notepad and modify this
connection so the username and pass match.

7. Point your browser to http://<yourwebsite>/echelon/index.php
(or whatever the installation path is) and log in with
'admin' and 'admin', change the password for this user, and have
a bunch of fun!

For a lot of people that link is white, but I get that error I sended...