For future reference... how uninstalled drivers

[pbXassassinX1524]

Okay, now I have driver cleaner, and I get how it works, but I know that there has to be like a step by step thing on how to correctly remove nvidia display drivers (or I guess ATi for that matter)

I'm really just looking for a step by step guide (someone writes up or some site anyone knows)

thanks to all who help!