AMD and CPU power management?

[Lotustar]

I have an AMD Athlon 64 and was wondering if I really need appleintelcpupowermanagement.kext. I have searched all over and cannot find a definitive answer. It's installed on my system along with Nullcpupowermanagement.kext. As far as I can tell my cpu does not get hot or anything. But sometimes on boot my machines hangs on the appleintelcpupowermanagement timed out thing. Not a big deal I guess but really i'm just curious what controls my AMD cpu power on hazards snow leopard install and is it a good idea or ok to remove appleintelcpupowermanagement? Anyone know?
I really am down to only two small problems with my install. The cpu thing and sometimes i get a usbehci unable to initialize uim thing. Any help would be MUCH appreciated. Thanks and merry xmas!