For the love of christ:
Do the following, listen to me, I am Jesus.
1. Download the UI from curse.com and extract it to your desktop.
2. Go to C:/Program Files/World of Warcraft.
3. Remove the WTF and Interface fodlers from this folder, back them up if you see fit.
4. Take the WTF and Interface folders from the UI folder you downloaded and put them in C:/Program Files/World of Warcraft
5. Double click the WTF folder.
6. Where it says "ACCOUNTNAME", rename it to your account name in ALL CAPS.
7. Double click that folder, which should now be "YOURACCOUNTNAMEINALLCAPS".
8. Where it says "YourServer", rename it to the name of the server your character(s) is/are on.
9. Double click the folder that should now be "YourServerName".
10. Where it says "CharacterName", rename it to the name of your character.
Start World of Warcraft, and there you have it. The text files in the UI will tell you how to configure certain mods that have slash commands for enabling the profiles.
GOD ****ING HELP YOU if you don't understand those steps, because I figured it out myself and it took 2 minutes, SEEK MENTAL ASSISTANCE if you don't comprehend this, because that's as in-depth as it gets.