http://www.blackberryforums.com/bes-...-ready-do.html
I did it after upgrading to 4.1.6 and the 4.1.6 upgrade took only 15 minutes for me.
SQL part is not that difficult to do.
SQL move KB here, it has both SQL and MSDE but still the same procedure
How to move from an MSDE database to a Microsoft SQL Server database