Underclock/volt in Linux for Pentium M?

[RWB]

My laptop is getting too hot and I don't need the processing power it has for the heat it generates so I am running linux and would like to know of a utility to underclock and undervolt the processor and perhaps keep the fans going even cool to help out.

[Snarkasm]

What Linux are you running, exactly? In Ubuntu, I've got a widget (gnome-power-manager, I think?) that if you compile it correctly will let you manually control what performance stepping your CPU is using. You have to reconfigure the whole applet package and set the SUID flag so you're allowed to set the speed via the applet instead of it just telling you the speed, but it will let you step down the proc if you do so.

[Snarkasm]

Also, look up the cpufreq tools if you don't want to use Gnome or an applet, I've used that via the command line to manually set a speed as well.