another question is that in Praetor's Building 101 thread, it said that when you get the heatsink out, you use a card or a tool to peel off the black layer. What is he talking about?
If it's lined up correctly the CPU will fall into place (don't drop it though) and you can then push the lever back into position. If you will be using some sort compound now would be the time to put it on. Before you do however you will need to remove the black pad or whatever other stuff is already on the heatsink. To do this take a plastic tool (card or something else that won't bend or scratch the metal) and scrape off the pad. Wipe off the rest with a xylene based cleaner, acetone, or isopropyl alcohol. Putting on the heatsink is fairly easy also, lay the heatsink on top of the CPU (Don't push it on the clips will do that for you) and very carefully push the clips into the correct mounting spot. After they've been "clipped in" push down on the 2 locking levers (they are in different spots for different heatsinks, just look around).