in answer to 3), Genesis is entirely in DS native formats (new formats at that), so you wont find any of it in a "Runtime", but you can organize it how you feel inside "My Library" or through the "Smart Content" database system.

Quote - to enable using V4 items on Genesis you will need the V4/gen 4 shapes package at DAZ.

You just need DS4 and the default Genesis, as it comes with the Gen 4 clones and UV sets, you only need the gen 4 shapes for Genesis package if your trying to convert V4/M4 morphs to Genesis with GenX.