Ubuntu 12.04 Nvidia drivers

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http://askubuntu.com – i am new to Ubuntu. And i have been trying to install a new version of the nvidia drivers. When i do so, the resolution changes to 800*600 and i am unable to change it back. the reason i believe i need new drivers is because i tried to install World of warcraft and i manage to do so via Wine altough i were experiencing som graphical bugs. under "settings/Details/Graphics" it says "Driver Unknown" I tried to download the driver from nvidias homepage(but i did't know how to install it:( ) Is it possible my graphical bugs have something do to with wine? Or is this do to my drivers? And is the (HowTos)