Apparently there are still people not familiar with adding another master server since GU last got pwnt so I'll make a thread about it and hope that it will be noticed and used.
Adding the TL Master Server allows you to see servers hosted on it in addition to the GU MS.
This can be done simply by editing the masterservers.txt under cfg folder in your LX root directory( where LieroX.exe is).
Open the file, select all the text in the it (Ctrl+a) and paste the following into the window:
I think all players' masterservers.txt file should look like this, since you can then see all the servers hosted on TL as well.
Now comes the important part, however:
If you don't host the order of the servers won't matter at all, but if you do you should continue reading...
The first one of these servers (the top one) is where the server you host will be found by others, so with the current settings your server will be on GU, where most players will see it since it is the default Master Server.
But in when GU is down you might want to flip the servers so that you host on TL instead, so others can see your server.
Then masterservers.txt would look like this:
In short you host on the first of the two servers, and if GU is down you want to host on TL by using the later of the two options.
And even if the GU server goes up again, you should keep the TL server as second.
Need to add anything?
Edit: Thanks for corrections Razzy. Sorry!