Workgroup pc username/network logon name

Hi all

I have a client with a workgroup of windows 2000 and xp pc's, only server in use is a linux file server, so no AD.
Problem is the following: a lot of the xp pc's were set up with the default user as "owner", this we changed to a unique username for each person. the problem is that on the network the pc is still seen as "owner" but now just with a discription showing the changed name. also what i have notices is that the profile under 'my computer, properties, advanced, user profiles' and under "documents and settings" still reflects as owner, not the unique username.

Is there an easy way to change this without having to recreate the profile on each pc making it neccesary to re setup outlook, application shortcuts, desktop itpems and documents etc.

thanks in advance.