I figured it out, thanks! I just wasn't familiar with the ubbtnews.php add-on -- I hadn't even looked in the addons folder! Silly me.
Anyway, I got it working. Am I correct in assuming that include code will only work on a file with a .php extension? And if so, do you know how to put a redirect script into a php file? I want to put this news list on the default page for my main web site, and it is an .ASP page with a redirect in it that forces people who type in "http://www.passporterboards.com" directly to my threads installation. It looks like this:
<%
Dim HTTPHost
HTTPHost= Lcase(Request.ServerVariables("HTTP_HOST"))
If HTTPHost = "www.passporterboards.com" then
Response.Redirect("http://www.passporterboards.com/ubb/index.php")
End If
%>
Thanks!