Hi Bruce,
If they are running under Windows Vista, have them click the scroll wheel on their mouse and select the right task from the "Instant Viewer" display. Or, if they use Alt-tab to click between tasks, then they can see the company name the alt-tab panel, under the program icon.
If they "hover" the mouse over the task bar item, Windows will display the complete task bar title (which includes the company name) in a pop-up after a short pause.
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Andrew Bates