Maybe someone is interested, there is a nice tutorial by Sickleyield to use .cr2 gens on a Genesis 2 male.
http://sickleyield.deviantart.com/journ ... -470013331
The picture is done with the original Michael 4 morphs++ gens, but there is also a link to some free gens (not tested myself).
The gens are scaled here and the texture is adapted, but without any postwork.
P.S. And SY's Beautiful Skin shaders for G2 are used here...