Vam uses ONLY "genesis 2" models.  In very general terms, you would have to import the model into Daz and convert it to a genesis 2 female.  Then merge all the morphs into a single morph.  Then copy that morph and the models skin textures over to your vam morphs and textures directories.  Then add a person, load the morph and textures, and save the appearance.
I have no idea if this model conversion would actually be possible 
In unity, all you could do would be to turn the model into a custom unity asset, which could then be used in the game.  But that would result in a static, unalterable statue rather than a Vam person model.