Extract Xanadar Hunter UI into an easily found folder.

Copy both the folders (Interface and WTF) into you WoW directory.

Go through the folders renaming them as appropriate (Account name, Server name and Character name etc).

Run Curse to ensure all add-ons are the latest versions and update as required.

Log into your wow account and select Load out of date AddOns in the Addons menu at you character selection screen.

Once in game type /reflux switch XanadarUI <---- This is case sensitive.

Check the positions of all the add-ons are correct. If they aren't reload your UI, this usually fixes and rogue add-ons.

Everything should be ready for to head into your fav instance/raid!!