How can i change my display name in a Chat room?

I am using Yahoo Messenger 9. i would like to Change my Display name in a Chat room....

please do some reply.How can i change my display name in a Chat room?
Create an alias profile (Yahoo! Help section can explain how to do this.) Once it's created, you can select it in the ';Join Room'; menu where you will see ';Enter Chat room as.'; Note: you cannot remove or change your main id (the name you created when you first set up your Messenger account.)How can i change my display name in a Chat room?
look at the top of the messenger and click on messenger and go to contact info and click it. it should take you to your account details and you can change it and save your changes.