GL - Reopen Final Close Period

We need to reopen a GL period that was accidentally closed with a Final Close status. I have a ticket open with Lawson support but they have not provided much help. Can anyone confirm if the steps below are correct?

1. Create a quick paint utility of GLSYSTEM
2. Update the PER-END-CODE field from F (Final) to L (Limited) for the last period of 2012 (12/31/12).
3. I assume the user will then be able to use the Backpost option to reopen the period to add additional journal entries.
4. Check balances & run the rebuild programs (GL325, GL330, & GL320)

Is there anything else I am missing or need to consider? We will be doing this in our test system first, but I wanted to make sure I have the steps correct.

Any help would be greatly appreciated.

Thanks,
Laura