constantly changing CPU speeds for laptops

[speaks_1337]

i have an centrino laptop, with the pentium M.

as most of you probably know the CPU only changes speeds when under windows.

I was wondering if anyone had any ideas of what some good links or other information relating to coding a patch or something in C++ (my native language) that would allow the processor to change speeds while running, or at least let me run a command that would let it run at 300mhz or full speed.....

any ideas?

TIA

[Icarus]

This looks like the most promising site on the subject
http://www-lehre.inf.uos.de/~rfreund/acpi.php

All you really need to do is write some scripts that detect when the system is on battery and throttle it down or try the dockapp they have and help with it.