CREATE HIDDEN ADMIN ACCOUNT IN XP

Follow the Steps to Create Hidden admin Account in Windows XP

First Goto Start -> Run -> Type regedit -> Enter

In the Left Menu goto,
HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT\CurrentVersion\Winlogon

\SpecialAccounts\UserList*

In the Right pane, Right click -> New -> String Value

Right click on the new String Value and click Rename
Type the Name of the Account you want to hide.
Hit Enter then Right click on the String Value again 

and Change value to 0 which hides it. If you want it to

be Visible to all Enter the Value 1.
Now Save and Exit the Registry and Logoff.
Goto welcome screen and Hit ctrl+alt+del twice to bring up Logon prompt
Type hidden Accounts name and password
Enjoy!!