Stephan - Posted Sep 19th
I have updated the initial Post with a new link that should work (for now).
I am happy to report that this version still works with the recently released pfSense-RELEASE-p1.
It is necessary to reinstall the modified amdtemp.ko after updating pfSense. I left a copy of the modified version at /root/amdtemp.ko to make this easier after updates.
kldunload amdtemp cp /root/amdtemp.ko /boot/kernel/ kldload /boot/kernel/amdtemp.ko