You don’t need the Genesis1 Figure (=Generation5) to work with the Genesis2 Figures (=Generation6). Each Genesis Figure is independent!

The Genesis Figure (Genesis1) is an androgynous Base Figure for all Generation 5 Characters. With Genesis2 (Generation6)  comes the gender split again. So there is a Female and a Male Base. Like it was before Genesis1 with V4 and M4. But now the Base Figures are simply called Genesis2 Female (G2F) and Genesis2 Male (G2M).

The >Genesis Evolution Morphs< and the >Genesis2 Head/Body Morphs<  are like the Victoria++ and Michael++ Morph Packages. These Morphs adding more variety to your base figures. Some additional characters will require those morphs but some do not … like it was with Victoria++/Michael++.

I agree, the whole thing is a bit confusing and you have to read the product description carefully to know what exactly is required.

I assume you have an account at DAZ3D? DAZ Studio 4 is free software but only available with registration and purchase for 0,00$. :-) ... so you need to put it in your shoping card and go through the check out process!

If you are logged in to your DAZ-Account, in your product library, there you find both Download Versions. One for manual installation (.exe-File) and one for the DIM. On the bottom of that page you will also find the links to the Genesis Base figures.

I would post a screenshot but I´m not at home.  Later this day I will catch up …

As far as DSON goes, I´m just playing around with DAZ Studio. I don´t know anything about the DSON and how it works. Maybe someone else can step in here?