How to Install PHP 5 on Windows 2008 and IIS7
How to install PHP 5 on a server running Windows Server 2008 and IIS7.
Run the installer.
Click Next on the Welcome page.
Check the box if you agree to the terms and click Next.
Change the destination folder to "C:\PHP5\", then click Next.
Choose Fast CGi, then click Next.
Click on PHP and choose to install All Features. Once the boxes turn white, click Next.
Click Install.
Click Finish.