Install ports. As root
make install clean
When it's done, go back to being regular user and then you can run
It'll ask you for a password, create one. If this box is available on the Internet, pick a strong one.
Then you'll see that it's running a session, probably on screen 1. To access the box--say its is 192.168.8.12 you have the vnc client running on the MS (or whatever box) and for server name or IP address type in
It should then ask you for a password and you should be in a basic twm desktop. If you want a different desktop, then look for the .vncrc file in your home directory (Note the dot before its name)
You should see a line something like twm &, which you can change to startkde & (or whatever window manager you want.)
If any of this doesn't work, let me know, I'm doing it from memory but can check tomorrow.