We tried installing SQL Server 2005 on the same machine and reconfigured Biztalk to point to it, but found out all Applications are lost, then we copied management db from Express to 2005, got an error saying it needs reference to Express SQL Server\RuleEngine Db.
I'm gonna to restore everything back and exports MSI, and rebuilt a biztalk dev machine, to see if i can import the MSI onto the new server.
Is there anyone tried similar thing and succeeded?