No disrespect, but I could spend the next 15 minutes typing out the intricacies of what overclocking does to your computer in terms of side effects, thus indulging your laziness, or you could:
1) take my word for it
2) read one of the 586.000 articles on google telling the same thing over and over, I will not make this one 586.001 just for the sake of doing a quick search on google being too much effort for you!
P.S.: With a CPU this old, overclocking won't help very much. The litography is too big, the instruction sets are out of date, you are still stuck with petite cache size, and the data pathways are probably decayed with old age.
Feeding steroid to your grandpa with arthritis won't cure his ailments.