Ok, this is how you do it:
1.) Create a copy of the tribes.exe, and name it "server.exe"
2.) Right click on it, and go to properties. You'll see the following line...
Target: C:\TRIBES\Tribes.exe. You'll want to change that (in the server.exe file) to
"C:\TRIBES\Tribes.exe -dedicated".
3.) To edit the server name, players, ect... You'll need to go to
C:\TRIBES\Config\ServerPrefs.cs. Once you've done that you need to open Tribes.exe
4.) Once you've opened Tribes.exe you need to go to Options, and then go down to I believe its "network". You'll see a box next to the words "Register with Master server". You'll want to click that in order for people to see your server. Once you've clicked that close the game, and go open server.exe.
5.) Return to Tribalwar.com/forums/showtheard.php?t=390942 and post the IP including the port (normally 28001).
6.) Thats all... now all you need to do is add like Admin mods, maps, and edit the map list.
If you have any questions lemme know.