Hey, new poster here.

Just wanted to know how I would go about modifying my UI or what AddOns I would need to be able to make my UI like Caith's. Since my resolution is only 1024x768, I'm currently trying to rebuild Caith's UI to my resolution, but not going so well. So my main question is;
How does Caith make his Chat Frames, Casting Bar, Action Bars, Health, Mana e.t.c look so snazzy?
What tools does he use and how does he use them?
Help would be highly appreciated. Been trying to look for a decent UI for about 3 days now. :p
Regards, McTavish.