Installation on Web Hosting Buzz
From Habari Project
Web Hosting Buzz does support PHP5, however, by default they use 4.x. To enable PHP5, you need to add a single line to your .htaccess file for the directory in which you want to use PHP5.
AddHandler application/x-httpd-php5 .php
This should be added just above the Habari rules.
WHB provides shell access on requeust.