I did my self easier to do, the steps are
- With your old one, go to BBM - Options - Backup Management - Backup - Backup files locally - put it on your media card - Save!
- Send the file to your new one, its up to you, can be by file transfer or just remove the media card from the old one and put into your new device. File will be under media card with name like BBM-(backup date).con exp BBM-(12-06-29).con
- With your new one, open BBMessenger - Options - Backup Management - Restore _- restore using backup file from media card - direct it to the backup file you made before on previous step like BBM-(12-06-29).con then proceed YES!
Thats all, now you can check your new device with all your BBM contacts and Group....while on your buddies BBM they still have you but with new PIN of your new Blackberry!
Its simple, isn't?