You don't always want to have your ARDI application take up the full screen. Although it looks amazing running full-screen on a second monitor, some times you just can't do it - you need ARDI-VE to fit neatly in a window.
There are two ways you can do this.
Hold Shift When Starting Up
Holding 'Shift' when you double-click on your ARDI icon (and keeping it held down for a while while ARDI starts up) will pop up a window that lets you choose the resolution and window style for ARDI-VE. This is particularly useful if you have a multi-monitor configuration, or if you've changed your monitor setup which is causing ARDI to have problems starting up.