In order to play on Kronos you need to follow these simple steps.
1) Install/Download the game client:
(If you already have a copy of the game with patch 1.12.1 installed, delete your WDB folder and jump to step 2.)
Client.torrent (Windows client)
2) Create game account:
Create your Game account at https://www.twinstar.cz/manager/Register.aspx
3) Set realmlist:
In your World of Warcraft folder open the file realmlist.wtf replace any existing entry with set realmlist login.kronos-wow.com, save and exit. You should be able to connect to Kronos now.
4) The Kronos Team wishes you a lot of fun