Ah, thanks eric, but before I saw your response I found a solution at this google group forum thing... HERE
there are three files which you have to delete in user/library/preferences/microsoft
1: com.microsoft.Messenger.plist
2: com.microsoft.MessengerDaemon.plist
3: Microsoft Messenger User...
I know that it is possible in Windows, but for Mac OSX (10.4.8) how do I delete some of the (email address) accounts from the .NET Passport log-in drop-down list that I go through to sign on to MSN Messenger?
(I don't want to close the accounts, I just want them off this list for privacy)...