Newb Question - UI Mods?

I am a former WOW player and I really liked how the UI was completely customizable in that game. I have just started playing Guild Wars and at first I assumed that there were no UI mods for this game after a quick google search brought up nothing. But then I found this video where the UI has definitely been tampered with. So my question is are there any UI mods for Guild Wars and where can I find them?

There's no UI mods going around for guildwars. However if you open your options screen and press "customize layout" (orso), then press edit interface, you'll be able to resize and move most of the components of the UI.