User Account

I've set up a new PC for a friend and chose not to setup user accounts. The
administrator account was consequently given the default name of 'Owner' and
a folder called 'Owner' was automatically created under 'Documents and
Settings'.

I have since gone into Control Panel / User Accounts and renamed the friend
from 'Owner' to 'Rob' but the folder under 'Documents and Settings' has
stayed with the name 'Owner'. This means that instead of seeing the 'My
Documents' folder personalised in Windows Explorer as 'Rob's Documents', it
shows up as 'Owner's Documents' and cannot be renamed manually.

Does anyone know how to replace the name 'Owner' with the name 'Rob'?

Thanks