World Of Warcraft private servers....

Okay im a complete and utter fucking nub at this.
I really do not want to waste 20 Gig on something that doesn't work or is not right.
So please do not tell me to Google it or some crap, just help me please. I want to be cautious.
Okay, well I just found the worlds top rated WoW private server (Catacylsm and Wrath Of The Lich King).
Could somebody link me to what I have to download in order to play on this, it will be GREATLY appreciated.
This is the information about the server - Molten WoW private server.

That server is shit if you want WOTLK play on this one Arena-Tournament | Where the Challenge Begins you can even win 5k$ and shit in there tournament. PVP is really good and doesn't have that dumb ass pay 40$ and get gear that you can two shoot people with.


Download 3.5 http://thepiratebay.sx/torrent/61632...3.3.5a_(12340) then after it's done edit the wtf file and put in the arena tournament info. Shouldn't take long to download has like 1k+ seeds took me like 20 mins.