If those "conductors" are white pads (thermal pads) then you need to put it back on. The metal is the heatsink. I don't dought it. The same goes for clamshell ibooks. I'm sure you could mod a heatsink for it, but if a standard style heatsink would work Apple would have done that in the first place. You may be able to remove some of the metal-maybe into an iconic Apple logo of some sort.
-maestro