The 2nd and 3rd Generation Core i CPUs let you adjust the amount of Turbo Boost the CPU is using but unfortunately the first generation, non-Extreme CPUs, don't have this feature available. The 920XM has the TRL and TPL features unlocked but they are locked in the 720QM/740QM and 820QM/840QM by Intel.
With ThrottleStop about all you can do is set up 2 different profiles; one with Turbo Boost enabled and one with it disabled. Then set up an Alarm based on the CPU core temperature and have ThrottleStop switch profiles based on the CPU core temperature. It would be far from ideal but it might give you some control over the way Intel designed these CPUs.