No method for single core... it is software driven.
Most applications do not take advantage of the multi core/threaded CPU's very well.
Games (until some very new ones) are no different.
I play World of Tanks (uses single core/thread), Badlands (same), Portal (same), Team Fortress(same), BF3 beta (same), Battlefield F2P (same), and Bulletstorm (true multicore/threaded).
Laptops will run hotter due to tighter spaces and reduced airflow. Use a active Laptop cooler pad to keep temps down.
If it is not OC'd it will not run as hot either. When I run this @ stock it runs at abot 20c to 25c in game.