Dependencies in MS Installer / Wix?

Include A+B+C with every installer, and install to common files. Windows Installer will handle the reference counting so that only one copy will exist on disk and remain until the last product is removed. Upgrading will be fine, Windows Installer is designed for this sort of thing :).

A stable API may not be enough. What if an application accidentally relies on behavior which is an undocumented coincidence (such as the order of items in a returned list), or worse, on behavior which is actually a bug? An upgrade of the shared components may then break your application because it was not tested against the upgraded components.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.