I don't know why you got the impression that you should install Geneva and Zurich in a specific order, and that you also have to install the Addon Manager.
- The *installation* order doesn't matter, just use the current versions
- The Addon Manager is INCLUDED with both sceneries, there's no need to install it separately. All our current installers download the same files from the internet when they start, so it's not possible to get an old Addon Manager when installing a scenery, hence, there's no need to install it separately, if you are using a recent installer.
- The only reason for having a stand-alone Addon Manager, is just because some people might have older version and wanted to update that one without downloading a full package for a scenery they are not interested into.
The only thing that matters, with regard to Zurich and Geneva, is the ORDER OF PURCHASE, in order to get the 70% discount at Zurich, you need to BUY Geneva first. But the installation order doesn't matter.