I only used it a few times, not many reasons to use them as you can pretty much do a better update version with morphs, VAM also use gen2 base models/morphs/uvs which is pretty outdated.
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The files you need are inside the vam/var file (basically a .rar). Custom>Atom>Morphs, extract them and convert it.
It can be a little more complex in some cases but just play with it.
You should be able to, they use gen2 as base. Just convert it back to Daz with the tool i said and go from there.