some great logon screens for xp here, go and download 
http://www.angelfire.com/ab6/logonxp/view.html
btw go here on how ro use them and how to make one for your self.
http://www.angelfire.com/ab6/logonxp/tutorial.html
There’s a bit easier and faster method to change your login screen, just download Logon UI and it will save you from having to boot into safe mode.
people for some reason you can not download the Logon UI with a download manager, you will have to just click on the link and if you have a download manager monitoring disable it, to download.