Here are the two files that are required to play on Eternal Lands:
Client.exe 1.12 Megs
Replace your Client.exe in your Ultima Online folder with this one. It won't work without it.
Login.cfg 88 bytes
This is the new Login.cfg file, it has been updated so you will no longer need to replace it when the back-up server comes online. Simply replace your current Login.cfg file in your Ultima directory with this one.