The requested URL /cmsAdmin/admin.php was not found on this server

Hi Nigel!

It's definitely possible -- an IP address is no different from a domain name, it's just a different way of accessing space on a server.

If you're getting a 404 though, that means the files aren't actually located where that URL is pointing. If you upload any other files to that spot, can you access them? Often IP-based addresses will require some extra path info, as very few sites have an IP all to themselves (most use a shared IP address.) So it might be something like:

http://216.16.234.158/~yourusername/cmsAdmin/admin.php

...or something like that. :) Check with your server admin, they should be able to tell you the exact URL to your home directory.