Ok. For the passive stereo setup, WorldViz actually has instructions in their knowledge base site for this type of setup. The direct link to that is:
http://kb.worldviz.com/articles/916
What this setup does is set your card into horizontal span mode where it looks like one large display with twice the width you'd normally have. Half of that wide screen will be on the first projector, and half will be on the second projector.
Then, when you start your vizard program with the viz.STEREO and viz.FULLSCREEN options, it creates the left and right images side by side, taking up the entire width of this wide screen.
This layout will make it so the left eye will go to your first projector, and the right to the second one. With your polarizing filters in place on the projectors and wearing your polarized glasses, each eye will now get its own version of the image.
Aaron