unscrew 4 screws off of the bottom, with screwdriver-type 4mm hex wrench or gamebit or modified chisel screwdriver or melt plastic pen and screw with it. and then lift straight up the cover.
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Best thing is to take a clear bic pen, heat it up until the plastic is pliable, then press it onto the screw and wait till your hear the crack (thats the sound of plastic cooling over the screw, the crack is generated cause the plastic shrinks, if you press it on and pull it off, the bit you just made will be too small.) once you can pull out the screws, what i did was took a dremmel with a disk and cut a grouve in it, now i just use a regular flat screwdriver.
