Mike,
See if
http://west-wind.com/weblog/posts/1412.aspx helps...
>In my ASP.NET application, let's say http:\\myserver\myproject\default.aspx, I want to determine the virtual root (http:\\myserver\myproject\) in code. I have jumped through hoops to do this before in 1.1, but still didn't have an ideal way, and was hoping there was something in 2.0 that made it easier.
>
>Thanks!