with it in your Package Manager. If I understand correctly the Microsoft tool for creating MSI packages "WiX", uses a xml file for input. The only problem is that WiX is CPL and not GPL so we cannot ship it with ReactOS unless we make it a seperate download.
Why not? Its perfectly possible to include a CPL program on the same CD or zip file as a GPL program as long as they dont directly mix code (IANAL but this is what I understand). Linux distributions mix and match code of all different licences and get away with it.