@tolishot
Changing to the Voodoo is a matter of installing the correct video driver in Picasso96. I'd suggest removing the existing Picasso96 installation and restarting from scratch following the documentation provided on the MM CD. It's a little tricky for the Voodoo since it's not directly supported by the Picasso96 installation program.
I haven't yet setup my sound card, but it should be a matter of installing the driver, and AHI.