If you have a server running, with a db correctly linked and configured you just need to download a client that will work with your server files and just run it using a .bat file.
You can find clients in the Release section.
Copy the following and save it as a .bat file, then copy this to your client folder. (where the raiderz.exe is located)
@echo off
raiderz -ingamelogin -server enter your Server IP here -country USA
exit
Make sure your server.ini files located in each of the server folders are configured correctly, as well as parts of the DB that contain the IP.