www.microsoft.com/.../default.mspx is usually a good place to look but there's nothing obvious that relates to web  folders.

Try posting to: microsoft.public.windows.server.scripting.

We have used it many times

To map do net  use Z: http://server/directory for instance

Based on our experience, it looks like you cannot map a drive to the root portal but can map to any sub-site

For instance you can map to the Topics folder, by using net use t: http://server/Topics

It also works with any team sites net use y: http://server/sites/team

I’ve tried this too but can’t seem to get it to work. I look into it again.

Make sure the WebClient service is running on the server and on your client  if your client is a Windows 2003 server OS

Web folders are buggy. I'm not sure that they are ready for prime time.

I tested on several machines when writing my search chapter for the MS
Press Step By Step book. File Search in Office 2003 relies on Web
folders and Office frequently had trouble locating resources on those
folders. I didn't complete my research as I infrequently use File Search
from Office. But they are problematic.

You are right, the WebClient service must be running. But, in my
experience, there can be problems even if it is running. It is one of
those occasions where it works great if it works.

However, if you setup the security settings in IE, you can make it work