Change of Ownership??

I am having a problem with object ownership.
The person who setup the SQL Server setup the "dbo" account with his personal permissions. I need to change "dbo" so that the login name is the system account and not a personal account. Is this possible?

If this is not possible can I change the ownership of a system object?
I was able to change ownershipof user objects using the "sp_changeobjectowner" stored procedure, but it did not seem to work for system objects.

Any way around this?

- Ericdid you try sp_changedbowner? This would change the database ownership which I believe should change the system object ownership?>?|||The dbo user is so tightly "hardwired" into the database that I'd give the user a new login, change the ownership of their tables to that new user, and stop right there. I wouldn't even consider allowing the user to keep using dbo.

-PatP