Need some help

[Marcoali]

Hey.
I have a pretty normal UI.
Only like In-game helping add-ons ( E.G Questhelper. Titan Panel. X-Perl)
But now i would like a really cool Interface like:
http://www.xistenz.org/images/wow/UI-Combat.jpg
Just as an example.
I have a Mac..
What to do now ??
And to how should i email or go ?

Greetings Marcoali