I have 4.3.4 but I also Downgraded to 4.0.6 using this steps!
This is eaiser then downloading a Direct Torrunt Patch for 4.0.6!
Witch could take hours
Follow this Steps:
1.Simply Repair your WoW
2.Download WoWMortal Launcher/Data Folder
3.Extract into your World of Warcraft Folder
4.Clear your Cache Folder
5.Clear your Cache Folder in your data folder )World of Warcraft>Data>Cache)
6.Clear your WTF Folder
7.Open your Data Folder (Make sure you do this Right and delete these exact Files as i say)
8.Delete following Files
9.Go back to your World of Warcraft folder
10.Open WoWMortal's Laucher! And Play The best Non OP Server Ever