it was pretty easy. First, unscrew the 4 screws and take off the black bracket. Then slowly and gently pull the heatsink unit off. it feels like it's glued on but trust me, it comes off with a little persuasion. It's just stuck on the thermal compound. With the NV5, I went from 63c idle to 55c idle and 85c load to 66c load. Better improvement in load, but that's where it counts, right?
<font color=blue>This guy here is <i><b>dead!</b></i></font color=blue>
<font color=red>Cross him <i><b>off</b></i> then.