Change username under Documents and Settings

I recently got a laptop from my cousin. I have actually purchased it with nothing on it and I changed the info through Dell and went ahead to install the software that I needed. Actually, my username ABC is using the profile directory for XYZ. So I ran a tool to extract the below:
Username : Administrator
SID : S-1-5-21-2819713430-23199179-830664976-500
Profile dir : C:\Documents and Settings\Administrator

Username : ABC
SID : S-1-5-21-2819713430-23199179-830664976-1007
Profile dir : C:\Documents and Settings\XYZ

Username : Guest
SID : S-1-5-21-2819713430-23199179-830664976-501
Profile dir :

So, I would like to change the profile dir from C:\Documents and Settings\XYZ to C:\Documents and Settings\ABC

Does anyone know how to do this? Thanks

You can try to fix the "Registered to" information from Windows XP by going into Start and then Run and then type regedit and press enter. After that locate this entry - HKLM\Software\Microsoft\Windows NT\Current Version\RegisteredOwner and HKLM\Software\Microsoft\Windows NT\Current
Version\RegisteredOrganization.

Also check the below links for more information:

How to create and configure User Accounts in Windows XP
http://support.microsoft.com/default...b;en-us;279783

How to Copy User Data to a New User Profile
http://support.microsoft.com/default...b;en-us;811151

You can try to do the following:

1. First of all create an entirely new userid ("abc", say).
2. After that you have to copy everything I want from ABC/XYZ to abc.
3. Now try to remove ABC/XYZ (there might be a choice to delete the user directory). Ensure you have everything first.
4. After that create a new "ABC" and then copy everything from "abc" to "ABC".
5. Now try to discard "abc", once you are sure you have everything.