Forgive me if this is somewhere on the forum, but I couldn't find it easily. I remember not too long ago struggling myself to try and figure this out. If this is somewhere else, mods, please delete this thread. I thought we should have a simple thread on how to install these wonderful mods/UIs so that those that are too shy to ask aren't thumping their heads against a wall. 1. First, download the file you want to use. If it is in a compressed format, be sure to unzip it. It doesn't matter where you save your file. 2. Then, select and copy the unzipped folder (ctrl-C). 3. Then, navigate over to C:\Program Files (x86)\Electronic Arts\Ultima Online Stygian Abyss\UserInterface (this is on Windows 7, not sure what the path would be on other operating systems). Paste the folder that you copied earlier here. 4. Now, start the EC. At the login screen there are 5 tabs at the top. One of them says "Custom UI". Click on that button. It will open up a drop down list of all the folders that are in your "User Interface" folder. Select your User Interface, then hit Okay and start playing! Hope this helps someone!