Xen on Lenny, AMD64 Kernel

[Gav <nntp@n1c.co.uk>]

I have just installed Lenny (AMD64) and the Xen kernel (from repos). I am 
trying to make this machine as efficient as possible because it will be 
left on 24/7 at home, but it appears that there is no powernow-k8 kernel 
module in the Xen kernel. Is it possible to get powernow running in Xen 
or should I be looking at something else?

This is bugging me a bit because I've built a pc with low power "green" 
components specifically for this job but is using more power than my old 
dual 1GHz PIII. :o)

thanks

Gav