I just converted for La Femme the first garment I bought for Genesis 9, the Vihar Outfit. You don't need to clutter up DS by downloading Genesis 9 to use products for the figure. G9 retains the A-frame zero pose of G8. Oddly however, the clothing loads in DS with the legs so close together that there is virtually no thigh gap, and the boots actually had polygons from the two legs overlapping. I will buy a cheap G9 outfit with pants to find out whether this is just an oddity of the vendor or the rule. This is where the fact that most, but not all, force closing is actually rigged, One can pose the clothing pieces in DS to match LF's T-pose before exporting an obj to import into Poser. In this case, though, the panty rigging for the thighs included only twist and bend, not side to side.

Moreover, the grouping tool showed that the upper most thigh is part of the pelvis.

The only solution here turned out to be getting in very close and using a small diameter pull tool for the morph brush to patiently adjust the mesh.

The boots had the same problem, but fortunately, the thighs in DS were rigged for side-to-side movement.

I was able to rig the boots to LF not zeroed and then copy the Body Kit thigh morphs from LF to the boots to resize the inner thigh. Then I rigged the boots to LF with her zeroed and the boots not.