You can get tweakui for XP here.
Go to the logon section and input your info for autologon.
When I start up my computer, I get a logon screen. Its not the Welcome to Windows screen but Windows Logon screen. My name is already there but I need to put in a password. Does anyone know how I can get rid of this screen? I am the only one that uses the computer and don't need to sign in.