http://www.ResExcellence.com/hack_html_01/06-01-01.shtml Main thing they don't mention is that OS X ships with the root account disabled by default. To activate it, you have to drop into the terminal and type: sudo passwd root At the prompt. It'll ask for the password, then you can %su and continue from there. I'd say there's a 30% speedup from 10.0.3. I put my swap partition on a seperate 12 G drive in the first 500Mb (540, multiple of 80). Try it!