Hi, I have an iBook (OSX 10.2). How do I alter the personal information I typed in the very first time I bought the computer? I've tried browsing around System Preferences and searching through "my account", but it won't let me change my info. It's really frustrating because I don't want some of the people I'm iChatting with to see my real name (displayed instead of my AIM name). Any advice on how to fix this would be greatly appreciated. Thanks in advance!