I'll be purchasing a new Mac soon in the future. Since my needs for photo and video software are of a professional level, I never touch iPhoto, iMovie, etc. etc. What I would like to know is... when I buy a new Mac and I boot it up for the first time, is there a way I can customize install before I even reach the desktop? Or must I reinstall the OS via the Install CDs to customize it? Thanks for the help.