first download the WoW game first, you can prolly just torrent it, then download the 2.4.0 patch, you can find the mirror for it in wowwiki.com
Next, go to scapegaming.com and register an account.
After your done with all those, go to the WoW folder and look for a file named "realmlist.wtf", then open it using notepad.
Replace everything there with this:
set realmlist logon.scapegaming.com
Then you can now play using the account info you registered in scapegaming. Yep, it's that easy. lol Just takes a long time with all the downloading.
Oh yeah, don't use the game icon on the desktop, use the one in the WoW folder. That's all folks! btw, this probably should have a separate topic. lol