http://www.asp.net/learn/mvc/tutorial-08-cs.aspx

http://blog.codeville.net/2008/07/04/options-for-deploying-aspnet-mvc-to-iis-6/

Instead of using the registermvc.wcf script, you can add a new extension to IIS that is mapped to the ASP.NET framework by hand. When adding a new extension yourself, make sure that the checkbox labeled Verify that file exists is not checked.