my IM shows my full name when I IM...how can I change this to show a screen name only? I e-mailed the yahoo support but what she said makes no sence to me..she told me to go to the IM menu..well,I cannot find that anywhere..I have looked under everything and see nothing that resembles what she wants me to go to..then she tells me to sign out of the messenger..HA,can't find how to do that eiteher..can someone help?