how can I setup a simple flat html for documentation inside a asp.net mvc app's url space?

Question

I have an asp.net mvc app at http://customApp/ on a LAN. The custom app does it's thing.

I would like to put documentation for the app at http://customApp/Docs without having to have the developer modify the custom App. Basically, I would like to tell IIS to hand everything but /Docs to the MVC app, but just serve html files from /Docs. (The html was produced by MS Word 2010 if that matters)

1. Is this possible?
2. Is this reasonable to try and do, or is this the wrong way?
3. Should I be investigating virtual directories, or something else? If something else, what?

Thanks in advance