[luna9966]

You can make small launcher like this on C#:

private void startGame()
        {
            this.gameInstallPath = this.getInstallDir("BNS_KOR"); //here you need to put path 
            Process process = new Process();
            ProcessStartInfo processStartInfo = new ProcessStartInfo();
            process.StartInfo = processStartInfo;
            processStartInfo.FileName = this.gameInstallPath + "\\bin\\Client.exe";
            processStartInfo.Arguments = "/LaunchByLauncher /Sesskey /LoginMode";
            process.Start();
        }
Code: C#