Quote - ...I've managed to import V4, cut off her head and toes...

Digital vivisection is one of the great joys of modelling

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It isn't exactly what you are after; but you could select the dummy and hide it.
View -> Hide Selection (ctrl )
I'm pretty sure you can't select or manipulate a hidden object in the model room in any way; but you can't see it either. It's easy enough to bring it back.
View -> Reveal Hidden Vertices (ctrl shift )

There's times you need to see the dummy, and it won't help you there.
Once you get the general shape in order; you don't really need to see the dummy all the time, it will help you out there. You can just toggle the dummy in and out of view from time to time to check for pokethrough and fit.

Friends don't let friends use booleans.