php with iis

Hi, I'm very new to php sadly and having trouble installing php on my computer. I had asp.net installed previously and currently trying to make php work with iis. I followed the directions for the most part but "test" stage for test.wsf returns an error and trying to open the install/index.php page just prompts me to open it or save it. opening it does nothing as it seems to be associated with a program called CLI. If there's anything i missed during the installation or any help will be appreciated. thanks. John L.