DISCLAIMER: ALWAYS back up your Interface & WTF folders before installing someone's UI. Just rename your folders to "Interface_NOTKURI" and "WTF_NOTKURI" and they'll be there if something goes wrong.
ADDON SELECTION NOTE: ACP (AddonControlPanel) has various profiles set up to 'smart-select' add-ons for various situations. To raid, go to the bottom-left "Sets" button, then load "Raiding", then Refresh! Viola!
If something looks amiss/messy, utilize each addon's profile settings. Not everything is guaranteed to be plug-and-play.
Make sure you rename "YourCharacterName" and similar folders to your own character's information.