If your download doesn't start you can click this direct link:
http://yourhead.com/appcast/RW6/Stacks3/Stacks_3.2.7_3927.zip

To Install

  1. Double-Click the file to unzip it.
  2. Double-Click the plugin to install it.
  3. Quit and then restart RapidWeaver.
  4. Enjoy!