GetURL problems with IE from projector

When launching web pages from a projector, I’ve noticed that if the user opens a web page with Explorer and does not close Explorer before returning to the projector, any additional web pages opened from the projector will open in a new browser window beneath the projector. What happens then, is that the user ends up with a whole bunch of explorer windows open beneath the projector.

This is not an issue in Firefox. In Firefox, each additional web link clicked from the projector opens in the same window and the browser is brought back to the front.

Has anybody found a workaround for this problem? Thanks.