Winhost equivalent of CPANEL's URL redirect

I'm a first time user of ASP hosting and was looking for the Winhost equivalent of CPANEL's URL redirect.

Under (UNIX-based) CPANEL for my PHP webhosting account, I could set all internal and external requests to 'firefightersonline.com' to be redirected to 'firefightersonline.com/public' so that all the relative references (i.e. my INCLUDE statements would be relative to the redirect of 'firefightersonline.com/public', eg. 'firefightersonline.com/public/scripts/script.asp'

How do I accomplish this? Support has sent me the usual KB on subdomain redirects as well as parent path but this does not appear to be the issue.

I created a new file called 'Winhostdefault.asp' put it in the root folder with the following code:

<%
If InStr( UCase(Request.ServerVariables("SERVER_NAME")), UCase("www.firefightersonline.com") ) > 0 Then
Response.Redirect("/public")
ElseIf InStr( UCase(Request.ServerVariables("SERVER_NAME")), UCase("firefightersonline.com") ) > 0 Then
Response.Redirect("/public")
End If
%>

Then when I type 'www.firefightersonline.com' the site does not redirect to /public, instead it shows the root folders.

When I click on 'Winhostdefault.asp', I get:

"Active Server Pages error 'ASP 0126'
Include file not found

/public/default.asp, line 18

The include file '/include/subs.asp' was not found."

Anyone encounter the same problem? (I see a few people trying to do subdomains or multiple domains for the one webroot - this is not what I'm trying to do. I just my one domain to work out of the /public directory)

Many thanks