> The hints that the vcredist cannot/should not be installed nested, but 
> should be chained.

So how do I do chaining if I can only ship a single MSI file (which is
my objective)?

> The details on the full flags used/supported by the vcredist files.

I don't think using vcredist can work at all. I would be happy to
be proven wrong, but I really cannot see a solution to use it. Instead,
I believe the merge module must be used.

> And the last one how to do the merge modules (and some other 
> scenario's) way of adding the dependency.

Which way specifically are you referring to? Using Visual Studio?
I don't think Visual Studio is capable of producing the output
that we desire (but again, I would be happy to be proven wrong).