disable last username in login prompt for w2003/xp

[MrLinus]

Hive: HKEY_LOCAL_MACHINE
Key: \Software\Microsoft\WindowsNT\CurrentVersion\Winlogon
Name: DontDisplayLastUserName
Data Type: REG_SZ
Value: 1

Seems to be the same for Terminal Server: http://support.microsoft.com/?kbid=260711