Here's some code I got from somebody regarding multi-hosting on a single IP
with IIS3.0 and ASP:
Create the following .asp code --that assumes domain2.com is the main domain
and that domain1 is a sub directory under that root. Then register both
domains to point to the same IP address.
<% domainname = Request.ServerVariables ("HTTP_HOST")
If domainname = "www.domain1.com" Or domainname = "domain1.com" then
sitetitle = "domain 1"
sitepath = "/domain1/index.htm"
Else
sitetitle = "domain2.COM"
sitepath = "default.htm"
End If %>
<title><%=sitetitle%></title>
</head>
<frameset frameborder="no" framespacing="no" rows="100%,*">
<frame src="<%=sitepath%>" name="main">
</frameset>
Howie Hamlin
email: howie@hoot.com
website: http://www.hoot.com
phone: (516)737-4668x101
fax: (516)737-9539