Using ym only my first/last name or my email addy display in the im window, i want to use my id only.. how?

i looked up the other answers.. none of them worked. i tried to delete the email profile, marked the profile as inactive, edited the 3name areas in the contact information.. i still see either my name or email in the im window. i do not want this for privacy reasons. how can i fix it? i have an sbc account so my main email and connections are through yahoo.