Download ClassicUO and configure it or change the login.cfg file in the client directory to use 127.0.0.1,2593
On ClassicUO server IP 127.0.0.1 and port 2593
Can definitely be done. This is the setup I currently have.
I'm using client version 7.0.86.2 - you would need to obtain that. Happy to share a ready to go version of the server though, but would be a few days.
Like The_Ice_Phoenyx said above - they are making heaps of changes to the official...