IIS rewrite in web.config

Hello everyone, I am fairly new to IIS rewrite stuffs, so I would like some advice. Here is the scenario: I have a site called http://foo/en/us/default.aspx Now I would like to rewrite url in such a way that when people just type http://foo or http://foo/ it should automatically goes to http://foo/en/us/default.aspx as 301 redirect. Please note that I do not have access to IIS rewrite module directly and have to add in web.config manually. Any help or suggestions will be highly appreciated.