HI,
The iChat option to edit your Profile is for AIM Logins. (AIM and @mac.com or MobileMe and iCloud name Logins)
If you do not have a Buddy List that Logs in to AIM then the option to Edit the Profile is greyed out.
Actually to be precise you have to be logged in with that Account/Screen Name (I logged my AIM logins out to check).
Can you be a bit clearer about what it is you are trying to do ?
In many cases the email address is the ID or Screen Name that logs in to the server.
MobileMe issued @me.com names will tend to run out as the MobileMe account runs out (Stop working)
@mac.com names work forever (Lapsed Paid for accounts still works as Valid AIM Screen Names.
Any AIM Account that had a linked email for password recovery or the security questions would need changing at AIM (your account info at AIM Settings)
7:39 PM Saturday; March 3, 2012
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
iMac 2.5Ghz 5i 2011 (Lion 10.7.3)
G4/1GhzDual MDD (Leopard 10.5.8)
MacBookPro 2Gb (Snow Leopard 10.6.8)
Mac OS X (10.6.8),
"Limit the Logs to the Bits above Binary Images." No, Seriously