WiX toolset on CodePlex
The Windows Installer XML (WiX) is a toolset that builds Windows installation packages from XML source code. The toolset supports a command line environment that developers may integrate into their build processes to build MSI and MSM setup packages. The WiX toolset CodePlex project stores the stable releases and Mercurial repository. The following links will take you to more details:
Homepage
WiX toolset
Bugs
File a bug
Manual
WiX toolset