mattlock

Everest Home Edition would recognize the Prescott properly since the last update to Everest was done Dec 2005.

Your CPU is hyperthreaded, so when hyperthreading is enable Windows sees it as two cores.

While the Prescotts ran hot, it's not healthy to run in CPU in the 70° range constantly, and will shorten the life span of said processor. As Iain said, it does have a thermal throttle that will reduce the clock speed when it gets to hot to prevent immediate damage. If after the throttling kicks in the CPU temp continues to rise it will hit the thermal trip point and shutdown completely. The throttle point is around 70°c, and when the Thermal Monitor is active (also known as Speedstep and can be Enabled/Disabled in the BIOS) the thermaltrip point is 100°c (I believe). If Thermal Monitor is disabled the thermaltrip will still be triggered but @ 135°c on the Mobile P4. This is know as On Demand mode.

That might be info than you were looking for, but the bottom line is you want to keep you temps lower 70°. If you want to continue running F@H on your laptop I would consider a laptop cooler as Iain suggested or reduce the CPU usage alloted to F@H.

You might also want to get a can or two of compressed air and blowout the heatsink. Blow through both the exhaust port and intake port, starting with the exhaust port.