I got 384mb of pc133 RAM
and ECS K7S5A board with XP1700+

Is there any way to overclock this rig?

I tried to bios FSB change, but it is limited to
100/100, 100/133, and 133/133

is there any chance I can o/c my system?
(My pc 133 ram is tested, and it goes around 148mhz without a hitch)