I am one of those who finds 12 for windows faster than anything since.
But if you try to load 12 into ans XP machine, you will get a divide by zero
error because the processors are so much faster.
There is a way to slow down the processor referred to as CPU brake:
Here are several sources I have found that allow this effect:
http://www.cpukiller.com/
http://www.diefer.de/speedswitchxp/index.html
The New PC SLow Down page:
http://www.geocities.com/kulhain/
I hope this helpful to all