Url Rewrite : asp.net 2 : IIS6

hi all ,
please help me,
i need to implement small url rewrite sample with the following constraints :
1-Use asp.net 2
2-run at IIS v6 without any modeifcation in IIS server
3-This web application called 'URLRewrite' and contain three pages (Default.aspx,Default2.aspx and Default3.aspx) and i want these points on it --->
        .when writing "http://localhost/URLRewrite" or "http://localhost/URLRewrite/Default.aspx", redirect me on Default page.
        .when writing "http://localhost/URLRewrite/Default2" or "http://localhost/URLRewrite/Default2.aspx", redirect me on Default2 page.
        .wh ...