I know how to apply thermal paste ... don't worry about that
See if you can pick up a heat pipe from that laptop from Ebay then. It is definitely not transferring the heat away from the machine and out the exhaust like it should since everything else is getting hot. Is it bent or kinked anywhere?
The i7 QM machines, especially from SB/IB generations run hot, but not usually THAT hot. 180-190F is pretty typical of mine, but most of the heat goes out the vent and not into the case of the laptop.