Hey all, i have an amd 64 processor, with the stock heatsink and fan, on an asus a8n sli deluxe motherboard. I'm trying to replace the heatsink and fan with an arctic cooling silencer 64. I took off the fan with the four screws, took out the metal clip, took out the 2 screws that hold this black plastic thingy on, but the big heatsink is still on. It wont budge and i can't find a screw or anything. How am I supposed to remove it? I was afraid that if i just gave it a good yank i'd destroy everything so i thought i'd ask. Plz help!