The Genesis 8 figures don't have the IK chains when transferred over so you'd need to add them manually to the CR2 -

sadly even when you manually add the IK you still get noodle forearms when dragging the hands, or the whole arm distorts from the shoulder when Ik is on and the legs pretty much ignore the Ik due to the double hip, pelvis setup.

So for me I won't use IK in Poser with Genesis 3 or 8, Hope that helps