Guys damn it...
You really didn't know than you HAVE to HEAT the IHS after cutting that silicon?

Lighter, candle or ever frying pan is good :P
With frying pan you have to put an razor blade to every corner for ihs.
Then just drop the cpu to hot frying pan and wait a sec, the ihs stays on the frying pan but naked cpu will make little jump so try catch whili it's still in mid air
Tested with C2D :p