Are you saying you want to try pushing a 133 MHz fsb CPU to 166 or 200 MHz fsb? There's no special guide, just crank up the FSB from within your BIOS if it supports overclocking. I think all nForce2 boards will support overclocking, but I'm not too sure.
If you're talking about actually modding the CPU so it will be recognized as, let's say 11x166 or 11x200 as opposed to the default 11x133 then I can't help you there. Never modded a CPU in my life. I never felt the need to.