What is the best way to set up the Vista Upgrade Prank prank?

For the best reaction, try these tips:

• Rename the .exe to something like "Windows Update" or "System Upgrade" so the person clicks it without suspicion
• The prank is most effective on people unfamiliar with Vista or who dread operating system upgrades
• Walk away after starting it -- the multi-stage process takes about 30 seconds, giving you time to return for the reveal
• The Mac desktop at the end is the best moment -- watch for the double-take
• Remember the exit method: double-click the fake desktop, or click it 5 times