Once that is in place Thermalright suggests you do a trial fitment to get an idea of where the push-pins line up and then tighten them in place with a screwdriver. I found the screws very hard to turn and could not get the clips to lock down completely; they still allowed some side-to-side movement of the push-pin. However this is not really a big deal, as once installed, the pad is pressed firmly against the mosfets and the amount of movement is very limited.
The push-pins are easily pressed through the mounting holes in the motherboard and the springs provide the necessary amount of tension between the thermal pad and the mosfets. If you notice a black wire snaking out from under the HR-09 it's because I slipped a probe in the space between the chips in order to measure temperatures. Note that I made sure not to place the probe where it came directly between the mosfets and the thermal pad, this could have a negative effect on the cooling ability of the heatsink. Also, I hadn't noticed when trial-fitting the HR-09 but the three capacitors immediately behind the mosfets are extremely close to the heatsink. In fact, pressing down on the HR-09 bent those caps out slightly, as the base of the heatsink actually comes in contact with them. This seems to be within a normal range of movement for them and no ill effects were noticed as a result. Blame Biostar on this one for placing the components so close together.
Just ahead, testing and conclusion.