Change the front side bus from the stock 266 to 333 and set the memory mode (assuming your using 800mhz ddr2) to 333/800 (5:6 asynchronous I believe).
as for voltage, is there an auto setting? I’d leave it at that (or adjust it to a TOTAL of around 1.33v… stock is like 1.25 or close to it).
Only if you feel comfortable doing so, I should say. You’ll see a noticeable difference from 2.4ghz to 3.0ghz on the quads. This is pretty mild though and shouldn’t have any problems, even with the stock cooler
edit: just make sure you know how to reset the bios (jumper on the pcb probably) in case it doesn’t POST