Hi, the easiest and probably safest way is to switch the FSB speed from 533Mhz to 667Mhz, which will result in a CPU actual speed of 2Ghz. That's the way I've been running of lately my 1201n without any issues or noticable impact on battery life, at least on lighter use.
You can configure it at the Security tab - Performance options - Northbridge Chipset Configuration - FSB speed to 667Mhz
Let us know your geekbench scores.
Here my benchmarks: