According to intel's site, the 2 duo is not unlocked, meaning you cannot change the multiplier, only way you can overclock it is by increasing the FSB percentages, which if you have absolutely no idea how to overclock, should not be done unless you want to fry your cpu as it can't support a high tj Max.
I would either take the time to learn how to do it before even attempting to do this or you might take the risk of destroying your PC or have someone who knows how to do it, do it for you. Not trying to put you down, but unless you want the smell of burning chipsets emanating from your pc, i suggest you do one of those 2 things lol