Here is a list of things you need to have installed before you can install phpBugTracker:
A web server (Apache, IIS, etc.) configured to run PHP scripts. The PHP version must be later than 4.0.6.
PEAR::DB. This is the database abstraction layer that comes with PEAR, which is included with recent distributions of PHP.
A database server. phpBugTracker has been tested with MySQL, PostgreSQL (>= 7.1 required) and Oracle 8. If you wish to run this package on another type of database, I am more than willing to support more types of databases if you are willing to help with testing.
A database created on your database server for use with phpBugTracker. You will need to supply this database name during the installation process.
Smarty templates (http://smarty.html.net/). If you do not have smarty templates already installed, a package of phpBugTracker is distributed that has smarty included and ready to go.