Many questions, many answers. :-)
Yes, Rich, they would need to install the multiserver version
for you to see that Enterprise Manager option in the CF Admin. But
no, they would not need to uninstall the Server deployment (what
you did) to add the Multiserver deployment. They can co-exist
(though it's not something most would typically do).
The best news for you is that, yes, they can indeed just
setup a second site on their web server, and have that also point
to the one CF Server deployment you have installed. That is, of
course, assuming they run a web server that supports multiple
sites. If it's Apache, you're good. If it's Windows, then as long
as its Windows Server 2003 (or 2008, or Vista), you're good, too.
(Just for completeness, for other readers, XP does not let you run
more than one site at a time.)
If during the installation of CF you told it to have ALL
sites in the web server run with CF, you need do nothing more than
create the new site. It should immediately be able to run CF pages.
If instead you told it to only link CF to one site, then you'll
need to run the web server configuration tool again. You can do
that manually, even after the installation. See the CF Admin and
Config docs for more on that, as well as on this very question. (I
realize many like to just run stuff and hope that the interface is
clear enough, but as this question shows, for some things anyone
installing CF will be well-served by looking over that often-missed
manual.)
Hope that helps, Rich. It's not an RTFM answer.
🙂 Just
saying that if you need more than what I've said, it is in the
manual. Still, I'll be happy to answer follow ups if I can.
/Charlie (troubleshooter, carehart. org)