The Visual Studio features cannot be extended to support custom paths. However, in the ASP.NET and Web Frameworks 2012.2 update that will soon be released (you can download a preview right now from here), the Add View functionality was updated to be a lot more flexible regarding which folders will have it enabled and which won't. It now supports Add View in any folder that is anywhere under a folder called "Views".
Regarding Go To View, that was not updated because unfortunately there is no way for the VS tooling to be aware of runtime customizations made to the view engine - I agree it would be cool, though!
(BTW my source for this information is that I work on ASP.NET MVC at Microsoft.)