From 1.4 to 1.5.x
Make backup of you web/configs/db.php file,
copy all new scripts to the webserver,
restore the backedup web/configs/db.php file

From 1.3 to 1.4
Just copy the contents of the web directory to your current installation
You may have to install gettext module for php
If you are updating from 1.2 please apply the update_1.2-1.3.sql script!

From 1.2 to 1.3
Copy the contents of the web directory to your current installation
and execute the update_1.2-1.3.sql script inside the mysql database.

From 1.* to 1.2
Just copy the contents of the web directory to your current installation
