The WampServer folks have recently announced the immediate availability of WampServer 2.0, the new version of WAMP5. WampServer is an installer for Apache, MySQL, PHP on windows.
WampServer 2 is a total rewrite of WAMP5. Its main new feature is the ability to install and use all the available versions of PHP, Apache and MySQL with just one click.
With WampServer 2, you will now be able to reproduce your production environment on your personnal computer.
More information on WampServer's website : http://www.wampserver.com