FOR MSN EMOTIONS:
1. Right click the chosen Boo emotion and save it on your PC.
2. Open an MSN instant message window.
3. Click on the arrow next to the smiley emotion.
4. Click on "My Custom Emoticons" then "Add"
5. Click "Find Image" then browse to the saved file.
6. Enter a Keyboard Shortcut.
7. Press OK! Then you're done!