its held on with plastic push clips that extend through to the back of the motherboard. Use fine pliers on the back and squeeze the pins together and push them gently through. Release all the pins all lift it off. That simple.
Robilar, where do you cut off the heat pipe then? where it connects by the heatsinks? I bought the Extreme Spirit cooler to replace the northbridge heatsink, havent installed it yet of course. Prolly when I replace the CPU sink this weekend........