PHP Installation Problem

Hi, 

  I have installed PHP from using PHP
 5.2.13 installer [20,929Kb] - 25 February 2010, and for some reason, the PHP folder did not show up on my Windows C:\ folder. When I tried to execute a PHP script from my IIS, it tells me 

HTTP Error 404.3 - Not Found
The page you are requesting cannot be served because 
of the extension configuration. If the page is a script, add a handler. 
If the file should be downloaded, add a MIME map.What could be wrong here?

Alice

 		 	   		  
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