[Zope] IIS virtual directory and zope "directory" redirect

Hi, I have a zope web server running on windows 2000 on an internal windows-based network. I need a way for my IT department to point to a sub directory off the root on my zope server. For example, http://www.mypublicweb.com/stuff (IIS) should point to http://myinternalserver/stuffsubdirectory (Zope) How might I do this so that I can limit the access to the zope server to one directory (because zope does not have related file system folders like IIS) ??