How to Supercool your CPU:
(DISCLAIMER: this post will explain just that - how to cool it. It will do nothing for explaining how to protect your computer from the side effects of said cooling or garuntee it won't destroy your computer outright.)
1 You need an air compressor. a big one with a large, high-pressure tank.
2 get a whole lot of 1cm copper pipe (the longer the better - 100 ft should do it) and form the first half into a radiator, and roll the second half into a very long coil. Attach the two tightly together and attach the radiator end to the air compressor.
3 cap off the end of the coil, and drill a very tiny pinhole in the end of it.
4 get a long length of circular ducting and fit it over the coil like a sleeve. Close the end over the end of the coil, and insulate it.
5 cut a small hole in the bottom of the closed end, so any fluid or dense vapor will drain out.
6 replace your CPU heatsink with a lenth of insulated copper pipe
7 position the hole in the ducting over the copper pipe on your CPU
8 turn on the air compressor and let it run for several minutes
Congradulations, you now have a liquid air machine that will supercool the air until some of the gasses liquify and drip onto your CPU. You will probably break your computer, but at least you got it cold in the process.