I'm glad you got it. You really don't need to delete any user accounts. You could have several different accounts without passwords and have one of them set for the automatic logon in TweakUI for Windows XP. (I'm assuming you're using that based upon the earlier part of the thread.) The main Administrator account is actually not available to you at the normal login / desktop in the Home Edition. You can only log in under that primary Administrator account when you start up in Safe Mode. It's a good safety feature that makes sure you always have an account with admin access, and having it available only in Safe Mode also means that you won't use it for performing hardware and software installations. That, in turn, means that the primary admin account's profile can't get borked by a bad installation procedure. (It's not really common, but it does happen.)
Remember to not try to get rid of the Guest account. WinXP uses the Guest account for more than just providing a means of having an anonymous user log in under a very limited context. The OS uses it for establishing security relationships. I believe this has something to do with the way remote users log on when Simple File Sharing is enabled, and I imagine there may be other roles which the guest account plays. I do know that Microsoft specifically warns against trying to delete it.
Have fun with the toys!
- Collin