In general the Data and Runtime folders, and any other folders at the same level in the zip (such as People) get merged with the existing folders of the same name in your content directory - DAZ 3DStudioMy Library in your documents folder by default; the My DAZ 3D Library in the Public Documents folder is meant for DIM installs though you will have to use it for any Victoria/Michael 4 or other products that say they use the ExP system.