Its a genesis 3 model... my suggestion... export it to obj from daz in blender format. do the same for the genesis 2 figure. Import both to blender, decimate, fix any clipping, then export from blender (delete the genesis figure before export) as obj.
Then in Daz, do an import obj (from blender) and then use the transfer utility to link the objects. You may need to turn off the morphs option in the transfer tool or it can fail to import to VaM if you have custom morphs in daz.
If I have time, I'll do it today, but I've been working on a goth outfit for genesis 8 -> Vam... required a lot of blendering