Never heard of board snapping in two, if you do picture please 8) .
The application method for AS5 and dual core is described on their site. They recommand a drop in the middle of the heat sink, press it on the cpu, move it a little around. then secure the heatsink.
(for right handed
)
Here's how I secure Conroe heatsink, motherboard out of the case, anti-static bag of the mobo on your left hand, mother resting on top of the anti static bag, in your left hand.
Put the heatsink so that the connector of the fan is the closest to the connector on the motherboard without to much slack in the wire.
Press firmly on one of the platic clip untill you feel it click. Do the same with the one that is in diagonal from it. Click the 2 others.
Flip the motherboard to make sure all four plastic parts went all the way thru. If one is not as visible as the other, flip the mobo back and push some more. Sometimes a good amount of force is needed!
that should do it. I also put the ram right away, then mount the motherboard and connect everyting