I got a Taisol CGK742 heastink/fan. I am completely dumb to building a new computer, which I will eventually attempt to do, but for now since I just have the HSF I have a few questions. 1) There is a very small sticky pad(about an inch thin) on the bottom of the heatsink/fan unit. Is this a thermal pad? 2) On the inside of the unit, it is...well, hollow. Well, inside there is rows of some kind of grating, so you can see clear through if you line the rows up. Is this the heatsink? Thanks to anyone eho knows.