What's inside the WIX package and what do you need ?

To better use WIX without notepad ! you souhd install at least the following :

• Wix Toolset (for example, this version : http://wix.sourceforge.net/releases/3.5.2403.0/)
  which is about 35 Mb and contains the following elements (including MSBuild support) :

          where you'll find in the Bin folder the exe such as : Candle, Light, Lit, Lux, ...

• WIX edit (9 Mb for the version wixedit-0.7.3.msi)