How do I change my broadcast name (name that appears in the receiving end) to another name?

Eg. Currently, my nickname appears on the yahoo mails sent out to my friends. I would like to change this to another name instead.

How do I change my broadcast name (name that appears in the receiving end) to another name?
In IM, click messenger, my info. Change it to whatever you want.





In mail, click options, general preferences, in the to and from box, change it to whatever you want