I'm trying to run a sub-application off of my root Umbraco site. I noticed that Umbraco has its own handlers for Razor templates. I would like to use the default handlers, but I can't figure out how. When I break inheritance on the <buildProviders> element in the root web.config my server won't serve .cshtml pages at all because they are forbidden. In IIS manager the handler for .cshtml and .vbhtml is indeed forbidden. What do I need to do to enable and default MVC 3.0 application with my existing Umbraco site? Is this possible?

Thanks in advance for any help.