Seeing you have DDR3200 the easiest thing too do would be too go into the bios and change the FSB from 133 too 166 and put down the multiplier too 12.5 that will make your CPU run at 2075Mhz 166 FSB and make your Ram run at 333Mhz that isnt really over clocking your CPU allot but it does give your system more memory Bandwidth and that?s always a good thing
If you have a 2600+ with a 166 FSB and not a 133 FSB you may want too try taking your CPU up too 200FSB ? but before you go all the way too 200 FSB start at 178 and work your way up 3Mhz at a time testing each time if windows loads until windows doesn?t load anymore.
If your system doesn?t boot anymore you hafta clear the cmos the motherboard book tells u how and if u cant find it in your book its easy just unplug the power out of your Computer and take out the little jumper pin next too your bios chip or it could be next too your Battery.
Remember over clocking your CPU without increasing the voltage going too your CPU is pretty much free Speed but once you start putting up the voltage too your CPU that?s when you start getting things heated up and start degrading your CPU
Also make sure your CPU temps arent running too high anything under 50c is good if your CPU is running hotter then that put it back to Default and forget about overclocking until you have better cooling. Heat will kill your CPU over time and will make your system unstable.
But like the saying goes .. a little bit of anything never hurts J

after your done overclocking then its time too test your computer for stability if it starts crashing go back and lower your overclock until you have a stable system then your done!!! Easy as pie!!