For the velious style User Interface, navigate to the uifiles folder, make a new folder called velious, navigate into it, and extract this into that folder:
http://www.project1999.org/files/veliousuiv3.zip
In order to activate this UI, you must type "/loadskin velious" from ingame
Before I download it or if I want to, what is the major difference between this and the Kunark Interface?