4Images Gallery /config.php
B2 Evolution /conf/_basic_config.php
Boonex Dolphin /inc/header.inc.php
Coppermine Photo Gallery /include/config.inc.php
Cube Cart /includes/global.inc.php
dotProject /includes/config.php
Drupal /sites/default/settings.php
FAQMasterFlex /faq_config.php
Gallery /config.php
Geeklog /db-config.php
/siteconfig.php
/lib-common.php
Joomla /configuration.php
Magento /app/etc/local.xml
Mambo /configuration.php
Moodle /config.php
MyBB /inc/config.php
Noahs Classifieds /app/config.php
Nucleus /config.php
osCommerce /includes/configure.php
/admin/includes/configure.php
PHP-Nuke /config.php
phpBB /config.php
phpFormGenerator (only if you have saved form input to a database)
/forms/admin/config.inc.php
PHPlist /config/config.php
phpWCMS /include/inc_conf/conf.inc.php
phpWebSite /conf/config.php
PhpWiki /admin.php
/lib/config.php
Post-Nuke /config.php
Siteframe /config.php
SMF /Settings.php
Soholaunch /sohoadmin/config/isp.conf.php
TYPO3 /typo3conf/localconf.php
vBulletin /includes/config.php
WebCalendar /includes/settings.php
WordPress /wp-config.php
Xoops /mainfile.php
Zen Cart /includes/configure.php
/admin/includes/configure.php
Reff: http://support.hostgator.com/articles/specialized-help/technical/location-of-script-configuration-files