1. Click the Start button.
2. Go to "All Programs"
3. Find the Windows Messenger icon.
4. Right-click the icon and select "Properties".
5. Select the "General" tab.
6. Under the "Attributes" heading, check the box next to "Hidden".
7. Click "Apply" and "OK".
From now on, the Windows Messenger icon will be hidden in the Start Menu, but will always be logged by Windows as being present, so you'll never have to worry about respawning. NOTE: This will also work with any icon in the "All Programs" menu directory and subdirectories (i.e., readme files and uninstall files!).