Jcasp,

Here is the link to the patches for cpufreq for 2.4 kernels: ftp://ftp.linux.org.uk/pub/linux/cpufreq/
The thinkpad-source patch was actually found on Andrea Arcangeli's kernel website on kernel.org. Once patched into the kernel you can update the the source code from the thinkpad-source package thru apt-get or aptitude. I often combine it with Con Koliva's lck patchset to get a near 2.6-like kernel sans nptl.

HTH,

Durand