1) Install drivers with the utility "Driver Hardware"

2) Install Wine: open terminal and type: sudo apt-get install wine 

( if yuo want the latest version of Wine type:

sudo add-apt-repository ppa:ubuntu-wine/ppa  

sudo apt-get update

sudo apt-get install wine )

3) Configure Wine: open terminal and type: winecfg ( this will open a new window)

set "windows xp" in the windows versions option

switch in the graphic tab:

set "enable pixel shaders"

set "vertex shader" to hardware

enable "allow the window manager to control the windows"

switch in the audio tab and when it finished press ok

4) Install World of Warcraft with Wine (or copy and paste the folder from another partition or hdd if you have installed wow previously)

5) edit the /World of Wracraft/wtf/Config.wtf file with gedit and add:

SET gxApi "opengl"

SET SoundOutputSystem "1"

SET SoundBufferSize "100"

SET gxColorBits "24"

SET gxDepthBits "24"

SET gxResolution "1280x1024"

SET gxRefresh "85"

6) save and close gedit

7) run wow.exe with wine

for better performance should play using windowed mode: click on options when prompted you account details, click on video and set windowed mode.