I have the copper heatsink.
I'm not sure about the highest temperature. I think around 35°C.
Yet another... MDD Copper Heatsink disciple.
Operating temperatures reported under 100˚F (37.8˚C) drives some of us a bit crazy.
[54˚F (12˚C) just seems unbelievable, my apologies.]As for running Bresink's with a booted Tiger DVD... wonder if you could place Bresink's
on a USB thumb drive and run it from there while booted from the DVD? Just a thought.
Other than that, you might need a resident 2nd boot drive with OS X & Bresink's to boot from.