Why?
Ditch the Bvision and use the Voodoo instead. No meaning of using both. Or better, buy a G-rex and use it with your Voodoo-card. With a G-rex you don't access all cards in the 8 MB window like Mediator do, since G-rex uses the BlizzardPPC's capabilitys for this.
But to answer your question: yes it is possible.
