Edit a buddy name in AIM for iPhone?

I like to view the people in my buddy list using their actual names and not their AIM screen names. On iChat this is very easy.

But on AIM free for the iPhone I can no longer do this.

I was absolutely able to do this on AIM free for my iPhone in the fall of last year, but somewhere down the line of an app update to AIM free I can no longer change the user details of my buddies to display their names.

for example, if a buddy's user name is buddyxyz123 I prefer to view him or her as John Doe.

Is this still possible in AIM free for the iPhone?

If not is there a good AIM app for the iPhone that will allow me to do this?

Thank you