PHP installation _ help needed

Hi people! I have MySQL working with ASP under win2000 and IIS. I have recently tried unsuccessfully to install PHP. Initially I started with zip binary distribution. I tested it with:- <html> <head> <title>PHP Test</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> </head> <body bgcolor="#FFFFFF" text="#000000"> <?php echo "Hello World<p>"; ?> </body> </html> Couldn't be much simpler! Nothing worked but "view source" showed the above code. The implication being that the sever did not parse the code. I then deleted every thing and tried "InstallShield" with exactly the same result. I have reinstalled IIS - no change I have added PHP to the application mapping. I have given exec permissions to C:/PHP The setup instructions say that I must rename PHP TO PHP.INI in WINNT and that is all. Is this true. If not what precisely must I do? Failing the .INI question I think I have done everything in the OPINS. But you guys will know better. What have I missed? All thoughts gratefully appreciated Thanks Bob