Originally Posted by Leica

Duke, the creator of that UI, has already helped you out!

He released that UI for download in this post.

Inside the .rar file you'll find several directories, these need to replace the ones you currently have in your World of Warcraft directory. You may have to do some reconfiguring if your resolution does not match his resolution.

Typically a mod release will have the following directories:

Interface\
WTF\

Make a copy of your old ones and back it up somewhere, then delete yours and replace it with the ones in the .rar file.

After you've done that you may need to open up those directories and rename some files/subdirectories. Look for subdirectories with names like:

YOURACCOUNTNAME
YOURREALMNAME

Rename those to the information requested.

Post here if you have trouble, I can try to help out tonight if someone hasn't already, I just am not able to open the .rar file from the computer I'm at right now.