Mixed authentication in ASP.NET application

Question

I've got an ASP.NET application which uses forms authentication.

We're adding on an HttpModule that responds to requests in the /webdav folder and below. We need to use basic/digest authentication for these requests.

With <authentication> set to Forms in the root web.config, requests from webdav clients are receiving a 302 redirecting the user back to the login page.

Is MADAM the best way to achieve this?