Vault 9.02

We're in the process of migrating from Exchange 2003 to Exchange 2010 SP2 and we have one mailbox that will not migrate so the plan is to delete the mailbox and create a new one n the Exchagne 2010 server.  The question is how to attach the new mailbox to the old vault archive so all new vaulted email goes into the save archive as the old one and the EnterpriseVault.Shortcuts still work.