Multi-monitor displaying primary and secondary

Folks,

I've been using Keynote since the MacWorld when Steve Jobs gave it away but am stumped by this one.

I want to be able to have Keynote feed my slide image, i.e. presentation, to one monitor/projector, and have the Presenter Display output to another display/projector. I realize this isn't possible with a MacBook Pro. Has anyone done this with a MacPro? Either with multiple video cards or one video card and both outputs?

I want to have 2 displays at the front of the stage that have the presenter display sort of a poor man's teleprompter.

Any one have a solution for this?

Thanks my friends.