Question : How to add a domian user to my Server 2003 R2 computer

I've been using a server 2003 computer for a few years now as my desktop, my motherboard died the other day so I decived to install a fresh copy of server 2003 R2 on this computer which has a new MoBo on it now. I joined the domain as administrator. Now I want to add myself as a domain user on it but I cannot find where to add domain users from.
help?

Answer : How to add a domian user to my Server 2003 R2 computer

Here is the file, after fixing the worksheet name and reapplying my formula.