If you've seen the How To Install Ubuntu Guide for Parallels, this tutorial is very similar.  It offers a complete walk-through guide, taking you every step of the way through installing Windows Vista using Parallels Desktop for Mac.  Screenshots may vary, as this walk-through guide uses build 1970.  The how to guide goes through Setting Up Parallels for Vista, Installing Vista, and Installing Parallels Tools.

You can check out the walk-through guide, here.