Install the Yahoo! Messenger for Palm OS on your Palm Organizer and start the application by clicking on the Y! icon. Log in with your Yahoo! ID. If you already use Yahoo! Messenger, you will see your buddy list. If this is your first time using Yahoo! Messenger, click on the \"Menu\" button on your Palm, click on \"Msgr,\" then click on \"Add a Friend.\" Type in a friend's Yahoo! ID. If they have Yahoo! Messenger, click on their name and send them an instant message!