1. Configure sgwi
-----------------
Edit the %%WWWDIR%%/includes/config.inc.php file to reflect your
setup.

The default password for sgwi is admin/admin. It's specified in
the .htpasswd file in %%WWWDIR%%/ directory. Change it
with:

htpasswd %%WWWDIR%%/.htpasswd admin

Also make sure that the location of the .htpasswd file specified 
in .htaccess file matches your path.

2. Configure Apache
-------------------
Add a line in your httpd.conf to allow the use of .htaccess file.

<Directory "%%WWWDIR%%/">
        Options Indexes
        AllowOverride AuthConfig
</Directory>