IIS directory aliasing to a named file

Hi, Is there anyway to do this within IIS. I have a directory named '/Test' which I would like to alias to a file in that directory '/Test/test.aspx' which can then support a number of verbs such as OPTIONS and POST. At the moment, if I call the '/Test' folder with an OPTIONS request, I get that folder's OPTIONS, and again if I POST to '/Test' I will get '405 Method Not Allowed'. I know this is possible with Apache using the Alias directives so am hoping IIS can do it somehow too. Any help appreciated. Mark