You can install PHP, Mysql, phpmyadmin, Zend optimizer and Sqlitemanager in 5 minutes! by the following softwares. Downloading and installing these takes very much time, so I suggest you to download Vertrigo or Wamp.

About Vertrigo

VertrigoServ has been developed as a highly professional, easy to install package consisting of Apache (HTTP web server), PHP, MySQL, SQLite, SQLiteManager, PhpMyAdminand Zend Optimizer for Windows platform. With a convenient all-in-one installer, all components are installed in a single directory and can be used immediately after the installation process has completed. It is designed to be as small and flexible as possible. VertrigoServ is excellent both for beginners and for advanced users.
Download link (only of 8.2 mb)

About Wamp

WAMP5 is free to use (GPL licence).
DOWNLOAD WAMP5 1.6.6
packed November 02 2006
Apache 2.0.59
PHP 5.2.0 + PECL
SQLitemanager
MySQL 5.0.27
Phpmyadmin
(WAMP5 does not work with Windows 98, Me)

Download link (17.2 MB)
Thanks.