Date: 10/23/06 (Java Web)    Keywords: php, web, apache

Open up conf/settings.php and add this line: $Configuration[’URL_BUILDING_METHOD’] = ‘mod_rewrite’; Believe me, that’s all you need to do. Ain’t that easy? Note: I am assuming that you are using Apache HTTPD Web Server with mod_rewrite enabled. Note 2: I have tested it on windows but I have all reasons to believe that it will work fine on Unix / [...]

Source: http://blog.taragana.com/index.php/archive/how-to-enable-nice-friendly-url-in-vanilla-forum/