[ltp] T41p undervolting : how to apply a patch ?

[Bobby]

Hello,

I think my T41p is still too hot and I want to undervolt the CPU. I  
find a patch on this page :

http://www.thinkwiki.org/wiki/Pentium_M_undervolting_and_underclocking

I choose the alternative 2 : it's a file *.patch : how to apply it ?  
It will add the voltage_table in my /sys/devices/system/cpu/cpu/ 
cpufrq directory ? Because for the moment I don't have this file :/

If not someone know a better way?

Thanks