I installed DSON first, into it's default install location.

Then the other two Genesis Essentials installers, I installed into a new runtime parent folder (that I simply called "Genesis"). Then I added that new runtime folder to my Poser Library.

EDIT: The new Genesis cr2s should appear in a "DAZ People" folder in the "Character" folder (i.e. "Character" section in Poser Library) of whatever runtime you install to, I think?