This seems to be a frequent issue of IIS users who are trying to setup php - I guess I'm not an exception here.
I followed serveral tutorials online for setting up PHP, and I am pretty sure that I have everything setup as how it should be... although accessing any php file with a browser produces a 404 error, seeming to indicate a configuration issue.
PHP 5.3.5 is sitting at C:\php\, and the FastCGI Handler is enabled as a web service extension. I have renamed the production config file to php.ini, and I have uncommented and changed the value of the cgi.force_redirect setting to equal 0.
Despite all of that, it still refuses to work.
If anyone can help, and/or provide a checklist of things that I have forgotten to mention that need checking up upon, your input would be great.