|The 2000+ is supposed to run at 1.67GHz (12.5 x 133MHz)...don't be confused by it's PR rating. We can't tell you how to best overclock it without knowing the core your CPU is based on (Palomino or Tbred), the make/model of your motherboard & the type of RAM you have.|
A can give you a few hints though. The multiplier is locked at 12.5x & can't be changed, so to run at 2.0GHz, you'd need to be able to increase the FSB from 133MHz (266MHz DDR) to at least 160MHz (320MHz DDR). That means you would have to have at least DDR333 (PC2700) RAM & your motherboard/BIOS would have to support ALL the necessary overclocking options.
edit: I missed the model number. As Skip said, it can't be done with your setup.