Make sure you back up your "Interface and WTF" folder (copy it to another directory as I did), then delete your old Interface and WTF folder. Extract the UI files to your World of Warcraft folder.
DO NOT Log onto game as of yet.
I play on a US server, you would need to set your locale in the config.wtf to your region/country if you play outside the US. I'm not sure what everyone's locale is, but US is "enUS". Open your original config.wtf and it should be on the first line. Only do this if you are NOT playing in the US servers.
Go into the WTF folder and change the following (have no clue? check your original WTF folder):
YOUR_ACCOUNT - rename to your wow account.
YOUR_REALM - rename to your toons realm name.
YOUR_CHARACTER - rename to your toon that you want the UI used.
On your character screen, click the button "Addons" then make sure "Load out of date addons" is checked. In game type "/reflux switch Sikui" (make sure the "s" in Sik is capitalized).
Enjoy your new UI.
Below are all of the addons compiled that makes up Sik UI, by clicking on the addons name it will direct you for further detail and information. Interface Makeup
*cooldown timers for items/spells/abilities.
*a replacement for the UI buff frame.
*a small lightweight profile manager for people building ui compilations.
*Disclaimer: All the addons compiled in this UI does not belong to me nor am I the author. I have gathered the addons as anyone would, available by downloads within wowinterface.com and other similar web sites. I hold no responsiblity for any actions that the addon(s) may do or make. I simply use these addons for my enjoyment of the game, World of Warcraft.
If or any changes to the UI, it will be posted here. Existing addons in the UI has the settings saved, download updated addons and install them yourself as you would normally update an addon. As usual, always check to make sure the addons are active in the "addons" section of the character screen and the "out of date" box is checked.
[11/01/2013] *Rearrange raven and gnosis' graphics and animation output.
[10/29/2013] *Patch 5.4.1 release.
[10/17/2013] *Rearrange sct's graphics and animation output.
[10/13/2013] *Removed dk runes options off raven and replace it with suf's dk runes option.