Step 1: Download
Step 2: Install the Kernel Panic Screensaver
Then select KPSaver from the list of screensavers.
Uncheck the Show clock and check Only main screen.
Step 4: Rename and drag
Then rename itunec.app to iTunes.app.
Then drag the original iTunes icon out of dock, and then add the renamed file to a dock.
Step 5: Now wait for your victim to try to launch iTunes!
Remember, a KPsaver? ;)
And also the fake kernel panic will be the screensaver. :)