Do a search on the internet for it. You probably need to add in the .php extensions or something. Or, try this. Install PHP, put a .php file in your inetpub/wwwroot directory. Then RIGHT CLICK on the file and make sure it is set to open in Internet Explorer (if not, just right click, open with, choose Internet Explorer and click the box that says always open programs of this type with this application thingie) Then, to view the php page, in IE, go to localhost://pagename.php where pagename is the name of the php file, or go to 127.0.0.1/pagename
If you just open the file in IE it will not work alot of times. Thats about as much as I can help you, but there is a way to be able to open it anywhere, has something to do with adding the .php extension sto somewhere or something...look up installing php with iis online, you will get some hits, actually, here is a link
http://www.phpbuilder.com/columns/jayesh20021029.php3
right from the php builder website, the first one in my internet search 🙂🙂