STUMPED: path/style vars in Windows with IIS

Hello. I am trying to get path/style variables working in windows with IIS on a hosted environment. What I mean by path/style variables is the following: Say I have a script "test.php" that can be accessed via: http://mydomain/controller.php ...I want to pass variables to it like: http://mydomain/controller.php/article/10 ...With IIS, I get a "404 Object Not Found" error when I append anything after "controller.php". In the past with Apache this has always just simply worked, even as a cgi module. What do I do to get this working with IIS? Thanks in advance, Chris