here is the water cooling guide...

http://www.macmod.com/content/view/21/193/

Also, you should read over some of the other guides. There is some good info there.
_________________________
"Fix it 'til it Breaks."

Jacob - EiC & Director of Technology
Mac Pro Quad 2.66 - 4GB RAM
160 GB SATA RAID 1 - 650 GB Storage
Quad 19" Widescreen LCDs
Accessorized to the Hilt