[DotNetDevelopment] How do I configure a subfolder as an application in Visual Studio 2008?

[Buddy Z]

I have a root web.config, and I have a subfolder "blog" that also has
a web.config. My root and my "blog" subfolder need to have different
security and some other conflicting settings. This is not an issue on
my actual web server, because IIS lets me set the "blog" subfolder as
an application. It works great there. But how the heck do I do it in
Visual Studio??