Ultimin is a nice and clean ui and is useable on all classes bur i recommand an paladin]
1. Unrar and place the 2 folders on the desktop
2. Delete or make backups of your Interface and WTF folder in your WoW folder
3. Copy the 2 folders you just unrared into your WoW folder
4. Go into the WTF folder and Account folder then Rename the folder there
5. Then go inside that folder and change the folder "Your servers name here"
6. Then go into that folder and rename the folder "your chars name"