Displaying Multiple Screens of Information on 2 Screens

Hey all :)

If this is in the wrong place then please move it :)

Anyway, I've been asked to put up two televisions that will display the same information in the office. At the moment, it's going well. I have a single computer underneath one television that has the information playing on a slideshow and it's connected to a VGA splitter. This splitter then splits the image so that the same information is displaying on the TV on the opposite side of the office (the VGA cable runs up into the ceiling and across).

However, they now want more information being displayed. Specifically, they want a real time web-based interface to be shown and for the screen to flick between the slideshow and the real time interface. The slideshow only shows one image - a graph showing their call times. I was wondering if there's any easy way to do this? All that I can think of is putting the image of the graph on one side of the screen and the web-based interface on the other. I was kind of hoping for it to be in full screen, though so it's easier to see and people don't have to leave their desks in order to see it.

Any help would be greatly appreciated - thanks!