@rabidz7:
I have a 12" 1,5ghz last revision powerbook and want to overclock it also.
Please post/message me if you succeed.
I still wait for parts so I can do all my planned mods at once.
Meanwhile take a look here, maybe this forum/user can help us.
http://www.cubeowner.com/forums/index.php?showtopic=14765
this guy succeeded overclocking his 1,5ghz 12" to 1,67ghz by just moving some jumpers.
My guess is that you could actually overclock it more if you would solder sth and do sth with voltage.
Why yours still shows 1,5 i do not know but maybe you should have done it to 1,67.
someone commented this on the other forum of your first link:
" .......
1.75Ghz wasn't stable anymore and crasht the system. 1.67Ghz works great!
Good luck to all of you who's gonna do it as well
Gamoul! - 30/10/2005
1.75 can't work because it is a decimal multiplier, but you can try 1.83."
hope you succeed soon and I will need some help soon also cause I do not know know yet which jumpers should be moved to where...