Ok. I was actually about to post this question before, and suddenly I saw it. I would like to do this as well, even though I already have an administrator level account. Interestingly enough, though my account name is otherwise, the directory in "Documents and Settings", and the computer management properties have it as "Owner". This essentially meant that I never saw the "Administrator" in the logon when I first got my computer. It's only in safe mode.
Dang it, XP Pro is expensive to just go out and BUY to replace my home edition that CAME with my computer. (if building laptops without a factory was feasable, I would never have bought through dell or another such manufacturer, and I would have CHOSEN my own OS).
Come on...there must be a registry tweak for this...SOMEWHERE out there............