>Yuri, I know as much as you do, well, actually, less for I do not use dynazip or this method, I use, and I am quite happy with it, a very old library called eeva zipmaster (http://www.eetasoft.ee/zipmaster.htm), which I mainly like for it allows me to implement its events and show the progress of the operations, which it might be very common with the other libraries, but when I started using this one, it was the only free one that allowed it.

Well, it is better not to use it then. However this approach was published and discussed on many forums including .NET, C, Excel VBA, Scripting, etc.
One can just go to GOOGle Search, and search for words namespace, zip, scripting to find a tons of code examples based on this approach.