I am lost

Previously I had PHP on my older computer using IIS 5.1 it worked fine. But I'm on my new computer using IIS 7 and features like include or completely normal scripts that use to work no longer work. I have try to see if it's the web server and some of the times for the exception of the include function it is. How would I fix my main server IIS 7, is the new PHP 5.2 fully compatible with it? If not when will a fully functional PHP be available for work with IIS 7. In my php.ini file I began by using the recommended file and slightly modifying it enabling gd2, openssl and mysql. Thanks, Grant