Hi
Create a new WinCC picture. Set the size of that picture to same resolution as your dual head graphics card. For example if you have 1024
by 768 pixels * 2 (2048*768)then set the size: Picture Width 2048 and Height 768.
Then insert two Picture Windows with the size ofh 1024*768. Then define starting pictures for both of them.
Create a "dummy" project and try the OS-ProjectEditor to see what i mean, look at the @screen.pdl.
I've seen a dual head graphic card (like Matrox Millennium G450) used for that + some WinCC scripting to manage independent picture on each one monitor. Could you provide more details about what you want to achieve? Then maybe I could be more helpful.