Please give suggestions.

Your lucky if it supports the PIII600/133 at 133. If you have settings in bios, that would be your only path for overdriving it. The juper settings do not even reach 133. Perhaps you have the 600/100? If it is a Coppermine, the 600E will go to 800@133 easily, but not on your motherboard unless you can do this in BIOS. You really need a better motherboard. Do you have a Hewlet Packerd perhaps? Because the HP boards had clock adjustments disabled.

Cast not thine pearls before the swine

First of all, I seriously doubt that the jupers are even there, HP usually orders their motherboards without mulipliers or the additional clock crystal neede to make manual adjustments work. Second, even if you do have the jumpers for it, there are no jumper settings on the chart above 133, so you still could not do it even with a retail board. You could get the Asus CULS2-M motherboard, it would let you overclock your processor, and fits your case, plus it offers an AGP slot which automatically disables onboard video when used. As for your current motherboard, not much can be done. If you want to keep it, I would suggest you forget overclocking and try getting a Radeon PCI video card for it.

Cast not thine pearls before the swine