Did this myself last October....
Backup state databases, nsf, *.id, BESMGMT.MDF, BESMGMT.LDF
Document the Name & IP if OLDBES.
Shut down OLDBES and all BlackBerry Services
Install the same version of BlackBerry on NEWBES
Copy from backup the state databases, nsf, BESMGMT.MDF, BESMGMT.LDF to NEWBES
Start BlackBerry Services. It should pickup right away without any reactivation.
Basically, it's a knife-edge cutover.
BlackBerry Search Results