PP-2012 doesn't have the "Copy morphs from" functionality that PP-2014 has.

You'd need to use D3D's Morphing Clothes utility instead to transfer the custom body morph from Genesis to the clothing.

(WW + Plugin might work at least for Genesis-1)

Cage also had a free morph transfer script once.

 

PP-2012 +SR3 should be able to transfer the new joint centers from the figure to the clothing.

But I cannot test any of this as I only have PP-2014 on my machine.

I'm also not sure how well Genesis 1 and 2 actually work with PP-2012.