Does the scene already have two girls in it? And you just want to change one girl's look/appearance? Then just follow the guide I linked in my previous reply. But beware: sometimes changing looks/appearances can break animations, depending on how the animations are done.
If the scene only contain one character, and you want to duplicate it, that's a more complex scenario, because you then have to add a new character, "clone" the look (by following the guide I mentioned above) and then also add the same animation. Then again, this is already a very complex procedure, even for someone already being familiar with VaM.
There's a dedicated thread for 2.0
here... You might find more up-to-date information on the VaM discord though.
