I'm talking about the Picasso96 install
When you use Picasso96 with the mediator and a voodoo card you must first install the Mediator files, then Picasso96 but after the picasso96 install is finished you start the Picasso96 install again but only choose UPDATE from the Picasso96 install
Then reboot or double click on the voodoo monitor files in devs/monitors to activate the voodoo driver
Then go into p96prefs and you'll see all the Voodoo screenmodes..choose one and "attach to board" voodoo, then test the modes and save + reboot
Everything must be done correctly, if you don't read the documents you'll get problems like you might have now
Like DoctorQ says...first see if your voodoo is recognized