Prepare the morph

After you have successfully loaded the Genesis loaded you can scale it down a bit, since it is very huge (around 100 blender units). Scale it down in object mode, not in edit mode, so the actual mesh will not be distorted. You can also rotate it in object mode if you want, because it is lying flat (DAZ-Studio uses Y-axis as up).
In the mesh tab create a new shape key for the Genesis mesh. Press the Plus-sign twice to create one base shape key and another shape key for the morph. The first shape key is the Base shape-key and not to be modified. The second one created is the one that holds the morph, which is currently empty.