IP address shows in URL rather than domain name

I have an ASP.NET application deployed to a folder in IIS. If I designate
this folder as my default web site, any ASPX pages that have SmartNavigation
enabled render as a blank page with no content at all. Turning off
SmartNavigation or leaving the folder as a subfolder of the root/default web
site fixes the problem. However, since my root folder is the default and
target folder for the domain name/IP address, I'm redirecting from a page in
that folder to the subfolder. This shows the IP address for the URL rather
than my domain.

How do I:
A) Resolve the SmartNavigation issue in the root web?
B) Redirect or point to a subfolder and preserve the domain name in the
address?

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Paul Turley, MCSD, MCDBA, MCAD, MSF, MCT, Project+, A+
www.scout-master.com