The Piccaso96 software is the software needed for Voodoo cards, and the CyberGraphX software is used for Virge cards.
Since you are using a Voodoo card, then you obviously have to install Picasso96. On the MMCD I believe you can find a ReadMe file that descripes how to get the Voodoo card running; read it, and it will be dead simply for you.
As for the ethernet card, there is a difference. The X-Surf card needs a config file placed in ENVARC:SANA2, the PIC ethernet cards doesn't need this. However, it might be nice to have such a config file for the PCI ethernet cards, since my ethernet bridge has to be activated twice when using a PCI ethernet card, and the X-Surf only once.