its just a vu meter lined up so the led's face away from each other and the light comes from the middle,just search vu meter diagram on google and construct one yourself,i made one of these before and trust me it is going to be really hard to make internal on a ps2....i just put mine in my guitar amplifier cos i cudnt fit it in my xbox,but these things are really ultra mega cool,then wire it up to the sound out pins on the bottom of the mobo,ur going to need alot of resistors,capacitors and an lm3915 ic,however vu meters are ultra cool if you can manage to make them internal