I saw an early ML version installed on MBP 3,1 (2.4 GHz Santa Rosa). Processor temperature was higher than usual (it normally run Snow Leopard) and the fans kept spinning loudly.
I have been trying desparately to install Mountain Lion or Mavericks on my 2.4 Ghz White Macbook 4,1 w/4GB of RAM and I can't quite get it. I have followed HackerWayne's video for MLPostFactor and after the installation I get a silver blank screen. Maybe I will try to follow it again. I heard the Chameleon method might work but it is buggy. How did you do it? I am running Lion right now.