版型引擎的安裝與使用

是指 http://drupal.org/project/Theme+engines 嗎？

Theme engines control how certain themes interact with Drupal. Most users will want to stick with the default included with Drupal core. These contributed theme engines are not part of any official release and may not work correctly. Only use matching versions of theme engines with Drupal.

為甚麼需要使用呢？

下載回來，丟到themes/engin/這個資料夾裡頭就安裝完成了... = ="