I have been using a prop based on the M4 gens (it is well known here and produced by a PA who currently sells here in the DAZ store too). I prefer it to the DAZ geograft models because, a) it doesn't leave a hole when switched to invisible and b) it costs a lot less than buying multiple Pro Bundles just to get tha DAZ gens.
It can be parented to any of the Genesis generations with a little delicate maneuvering so long as it is not "fitted" to the host body. The problem I have is with textures. The product sells with a range of skin tones which can be adjusted to something close to the hip skin but never really exactly so there is always a tell-tale join. The best I have managed is to convert M4 skins and use the vendor supplied M4 Genital texture but that is very limiting in terms of available characters. So my question is this: Is there a way to transfer a G1/G2/G3 genital texture on to the M4 Gens? Could I, for example, paint it on in Blender or Photoshop? I haven't tried and I don't have my computer available where I am right now but any how-to hints would be welcome.