Now what you have just done is told the computer to backup the command program and the screen saver file, then edits the settings so when the machine boots the screen saver you will get an unprotected dos prompt without logging into XP.

Once this happens if you enter this command :

net user password

If the Administrator Account is called Frank and you want the password blah enter this

net user Frank blah

and this changes the password on franks machine to blah and your in.

Have Fun!

p.s: dont forget to copy the contents of temphack back into the system32 dir to cover tracks