How to change username in cookies? e.g. [email protected]

Windows XP Home Edition, version 2002, Service Pack 3
Internet Explorer 8

Hello:

Currently all the cookies generated by Internet Explorer include my family
name in the username section before the "@", e.g. . I
assume that is because my family name was used as the Windows account name,
which now shows beside "Registered To: when you right-click My Computer
Properties General.

I want to remove that family name from future cookies. What do I have to do?
If I simply use the User Accounts Control Panel to change the account name
that is displayed, will that change future cookies?

Or, does the username in cookies come from the user directory name?

If it's the latter, from the user directory name, then is the best method
to create a new Windows user profile, and then copy user data from the old
user profile to the new
profile as detailed here?:
http://support.microsoft.com/default...b;en-us;811151

I read about that method, and another method that involves editing the
registry key "RegisteredOwner" at
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion, so I'm
seeking to know the best method.

And, if I then do copy over the user data from the old user profile to the new
profile, will my applications all work afterwards retaining my prefs,
settings, etc., or will I need to edit any paths anywhere?

Thanks!